| ON SEMICONDUCTOR TRADING, LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120245927 | SYSTEM AND METHOD FOR MONAURAL AUDIO PROCESSING BASED PRESERVING SPEECH INFORMATION - A method, system and machine readable medium for noise reduction is provided. The method includes: (1) receiving a noise corrupted signal; (2) transforming the noise corrupted signal to a time-frequency domain representation; (3) determining probabilistic bases for operation, the probabilistic bases being priors in a multitude of frequency bands calculated online; (4) adapting longer term internal states of the method; (5) calculating present distributions that fit data; (6) generating non-linear filters that minimize entropy of speech and maximize entropy of noise, thereby reducing the impact of noise while enhancing speech; (7) applying the filters to create a primary output in a frequency domain; and (8) transforming the primary output to the time domain and outputting a noise suppressed signal. | 09-27-2012 |
| 20120235739 | PROGRAMMABLE GAIN AMPLIFIER WITH MULTI-RANGE OPERATION FOR USE IN BODY SENSOR INTERFACE APPLICATIONS - A system for analyte measurement includes a programmable gain amplifier including a first input terminal operatively coupling to the output of a sensor for sensing an analyte, a second input terminal operatively coupling to a voltage source, and an output terminal for providing an output based on a difference between inputs on the first input terminal and the second input terminal A controller is operatively coupled to the programmable gain amplifier for configuring the operation range of the programmable gain amplifier and/or selecting the output of the programmable gain amplifier for analyte measurement. The method includes monitoring an output from a programmable gain amplifier operatively coupling to a sensor for sensing an analyte, and controlling the operation range of the programmable gain amplifier, and/or selecting the output of the programmable gain amplifier for analyte measurement. | 09-20-2012 |
| 20120194114 | Motor Drive Circuit - A motor drive circuit includes: a drive circuit configured to drive a motor whose coil current decreases with increase in counter electromotive voltage of a motor coil; a detection circuit configured to detect whether or not a current value of the coil current is greater than a predetermined value; a first control circuit configured to control the drive circuit so that the current value of the coil current becomes smaller than or equal to the predetermined value, when it is detected that the current value of the coil current is greater than the predetermined value; and a second control circuit configured to control the first control circuit so that the first control circuit does not control the drive circuit based on a detection result of the detection circuit until a predetermined time has elapsed from a start of supply of the coil current. | 08-02-2012 |
| 20120187931 | Power Supply Control Circuit and Power Supply Circuit - A power supply control circuit comprising: a first control circuit configured to control on/off of a transistor, whose input electrode is applied with an input voltage, based on a feedback voltage so that an output voltage at a target level is generated from the input voltage to be applied to a load, the feedback voltage being in accordance with a reference voltage and the output voltage; and a second control circuit configured to control a feedback voltage generation circuit so that the output voltage rises with increase in load current flowing through the load, the feedback voltage generation circuit configured to generate the feedback voltage. | 07-26-2012 |
| 20120182649 | Motor Drive Circuit - A motor drive circuit comprising: a drive circuit configured to supply a drive current to a drive coil of a motor; a control circuit configured to control an operation of the drive circuit; a locking protection circuit configured to control an operation of the control circuit so that the drive circuit stops supplying the drive current to the drive coil, if a rotation signal, indicating rotation of the motor, is not generated during a predetermined time period although the drive circuit is supplying the drive current to the drive coil; and a prohibition circuit configured to prohibit the locking protection circuit from controlling the control circuit. | 07-19-2012 |
| 20120181966 | MOTOR SPEED CONTROL CIRCUIT - A motor speed control circuit includes: a first determining circuit configured to determine whether a rotation speed of a motor is higher than a set first rotation speed based on a speed signal corresponding to the rotation speed; a second determining circuit configured to determine whether the rotation speed is higher than a set second rotation speed, which is higher than the first rotation speed, based on the speed signal; and a drive signal output circuit configured to output to a drive circuit configured to drive the motor a drive signal for increasing the rotation speed when the rotation speed is lower than the first rotation speed and decreasing the rotation speed when the rotation speed is higher than the second rotation speed, based on determination results of the first and second determining circuits. | 07-19-2012 |
| 20120166205 | INSTRUCTION EXECUTION CIRCUIT - An instruction execution circuit includes: a memory circuit including a first memory element and a second memory element configured to require less power than the first memory element; a processor; and an address decoder configured to output an enable signal to either one, storing an instruction, of the first memory element and the second memory element when an address is outputted from the processor, the enable signal corresponding to a signal to output the instruction stored at the address, one portion of a program stored in the first memory element corresponding to a portion in which processing other than loop processing is described, the loop processing causing the processor to execute the specific instruction in a repetitive manner, the other portion of a program stored in the second memory element corresponding to a portion in which the loop processing is described. | 06-28-2012 |
| 20120161687 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, the target-current signal corresponding to a digital signal indicative of a target value of a driving current; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the voice-coil motor in accordance with the current-control signal, the filter circuit including: a digital notch filter; and a digital low-pass filter, wherein either one of the digital notch filter and the digital low-pass filter configured to be inputted with the target-current signal, the other one of the digital notch filter and the digital low-pass filter configured to be inputted with an output signal of the one of the digital notch filter or the digital low-pass filter. | 06-28-2012 |
| 20120146609 | SWITCHING CONTROL CIRCUIT - A switching-control circuit configured to keep a transistor on for a predetermined time to generate a target-level-output-voltage from an input voltage. The circuit configured to generate, every switching period of the transistor, a slope voltage corresponding to that of a ripple voltage contained in an output voltage during a time period when the transistor is off, limit an amplitude of the slope voltage so as not to exceed a predetermined amplitude greater than the amplitude of the slope voltage when the target-level-output-voltage is generated, add the slope voltage to a reference voltage, indicating a reference of the target-level-output-voltage, or a feedback voltage corresponding to the output voltage, and keep the transistor on for a predetermined time and thereafter turn off the transistor, when a level of either one voltage, added with the slope voltage, of the reference voltage and the feedback voltage reaches a level of another voltage thereof. | 06-14-2012 |
| 20120146604 | SWITCHING CONTROL CIRCUIT - A switching-control circuit to control a switching operation of a transistor, having an input electrode applied with the input voltage and an output electrode connected to a load via an inductor, to generate an output voltage of a target level from an input voltage, includes: a voltage-generating circuit to generate a slope voltage based on the output voltage in each of a switching period of the transistor, the slope voltage changing with a slope corresponding to the output voltage; an adding circuit to add the slope voltage to a reference voltage, indicating a reference of the output voltage of the target level, or a feedback voltage corresponding to the output voltage; and a drive circuit to perform the switching operation of the transistor, when a level of either one voltage, added with the slope voltage, of the reference and feedback voltages reaches a level of an other voltage thereof. | 06-14-2012 |
| 20120112240 | SEMICONDUCTOR DEVICE - An N type layer made of an N type epitaxial layer in which an N+ type drain layer etc are formed is surrounded by a P type drain isolation layer extending from the front surface of the N type epitaxial layer to an N+ type buried layer. A P type collector layer is formed in an N type layer made of the N type epitaxial layer surrounded by the P type drain isolation layer and a P type element isolation layer, extending from the front surface to the inside of the N type layer. A parasitic bipolar transistor that uses the first conductive type drain isolation layer as the emitter, the second conductive type N type layer as the base, and the collector layer as the collector is thus formed so as to flow a surge current into a ground line. | 05-10-2012 |
| 20120087053 | CONSTANT VOLTAGE POWER SUPPLY CIRCUIT - A constant voltage power supply circuit includes an output voltage dependent over-current protection circuit unit and a drooping over-current protection circuit unit. The output voltage dependent over-current protection circuit unit reduces, when an output current which is output from an output terminal of an output control transistor exceeds a first set value which is determined in advance, the output current from the first set value in a manner dependent on a reduction of an output voltage which is output from the output terminal. The drooping over-current protection circuit unit detects, with an external resistor, the output current which is output from the output terminal of the output control transistor, and reduces, when the detected output current exceeds a second set value which is determined in advance and which has a lower value than the first set value, the output voltage while maintaining the output current at the second set value. | 04-12-2012 |
| 20120083231 | TUNER - Noise in an audio output is reduced even if a mixing signal leaks to another tuner. A broadcast wave is received from a broadcast station by an antenna to which a mixing signal is mixed by a mixer to obtain an IF signal and demodulated by a demodulator. An oscillator outputs a mixing signal having a frequency difference of at least a barely audible frequency within an audio frequency band from any broadcast station center frequency allocated at a predetermined frequency spacing, the mixing signal is mixed with the signal received by the antenna, and the IF signal is obtained. | 04-05-2012 |
| 20120081049 | DRIVE CONTROL SIGNAL GENERATING CIRCUIT - PWM conversion is efficiently executed. An output control circuit comprises a flip-flop which reads crossing of a reference value by a rotational state signal from a motor, and generates a motor drive control signal according to a state of the flip-flop. A clock generator generates a clock which defines a time of reading data in the flip-flop of the output control circuit. A PWM conversion circuit PWM-converts the drive control signal using the clock as a PWM signal. | 04-05-2012 |
| 20120076343 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a target value of a driving current to be supplied to a voice-coil motor that drives the actuator; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the motor in accordance with the current-control signal, the filter circuit including: a digital-notch filter to attenuate a frequency band around the resonance frequency in the target-current signal; and a digital-low-pass filter to attenuate a frequency band greater than or equal to a predetermined frequency in the output signal of the digital-notch filter, the digital-low-pass filter having a sampling frequency higher than a sampling frequency of the digital-notch filter. | 03-29-2012 |
| 20120075816 | CIRCUIT DEVICE AND METHOD OF MANUFACTURING THE SAME - In a hybrid integrated circuit device of the present invention, leads are fixedly attached on the upper surface of a circuit board. The lead includes an island portion, a slope portion, and a lead portion. A transistor and a diode are mounted on the upper surface of the island portion. Electrodes provided on the upper surfaces of the transistor and the diode are connected to a bonding portion through a fine metal wire. The bonding portion of the lead is disposed at a higher position than the island portion. Thus, the fine metal wires connected to the bonding portion are separated from each other. | 03-29-2012 |
| 20120075154 | MICROSTRIP-FED SLOT ANTENNA - A microstrip-fed antenna is disclosed having a first dielectric substrate and a second dielectric substrate. The second dielectric substrate is disposed on the first dielectric substrate and the first dielectric substrate has a relative permittivity greater than or equal to the second dielectric substrate. The antenna further includes a microstrip line formed in the second dielectric substrate and a metal layer formed in the second dielectric substrate. The metal layer is positioned between the microstrip line and the first dielectric substrate and includes a slot. | 03-29-2012 |
| 20120074882 | STARTUP CONTROL CIRCUIT OF DRIVE CIRCUIT - Startup of motor is reliably executed and sonic noise is reduced. A control circuit controls a selector to apply control to output a full-drive waveform at startup and then output a PWM modulation waveform. The full-drive waveform which is an alternating waveform in which positive and negative are inverted at 180° is output. Then, the PWM drive waveform is selected. | 03-29-2012 |
| 20120074880 | DRIVE CIRCUIT - A drive control signal is effectively obtained. An offset is added to a rotational state signal. A drive control signal having a period which is reduced by a predetermined period compared to the sine wave form signal is generated between a crossing of a reference value for a second time and a crossing of the reference value for a next time by an added signal obtained by sequentially offsetting the rotational state signal in a direction reaching the reference value. A pulse indicating that the polarity has been reversed when the offset is added is added to the crossing of the reference value for the first time, to reliably detect crossing of the reference value for the second time. | 03-29-2012 |
| 20120074552 | CIRCUIT DEVICE AND METHOD FOR MANUFACTURING THE SAME - In a hybrid integrated circuit device, a circuit board on which an island portion of a lead is fixedly attached and a control board on which a control element and the like are mounted are disposed in an overlapping manner. The circuit board and the control board are integrally encapsulated with an encapsulating resin. A transistor disposed on an upper surface of the circuit board and a control element mounted on an upper surface of the control board are also covered by the encapsulating resin. Thus, a module in which an inverter circuit and a control circuit are integrally encapsulated with resin is provided. | 03-29-2012 |
| 20120068648 | MOTOR DRIVE CIRCUIT - A motor drive circuit includes: a first H-bridge circuit including a first source transistor and a first sink transistor connected in series and a second source transistor and a second sink transistor connected in series; a second H-bridge circuit including a third source transistor and a third sink transistor connected in series and a fourth source transistor and a fourth sink transistor connected in series; and a first control circuit to turn on or off the first and second source transistors and the third and fourth sink transistors in a synchronized manner, turn on or off the third and fourth source transistors and the first and second sink transistors in a synchronized manner, and further turn on or off the first and second source transistors and the third and fourth sink transistors in a complementary manner to the third and fourth source transistors and the first and second sink transistors. | 03-22-2012 |
| 20120068647 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: H-bridge circuits in a pair each including first-source and first-sink transistors, and second-source and second-sink transistors, wherein a motor coil connected between a connection point of the first-source and first-sink transistors and a connection point of the second-source and second-sink transistors; a current-detection circuit to detect a current flowing through the motor coil of each of the H-bridge circuits; an oscillation circuit; and a control circuit to control the H-bridge circuits so as to turn on the first-source and second-sink transistors of each of the H-bridge circuits at intervals of a predetermined period based on an oscillation signal, and turn off the second-sink transistor of each of the H-bridge circuits after a value of a current flowing through the motor coil of each of the circuits reaches a predetermined value, based on a detection result of the current-detection circuit. | 03-22-2012 |
| 20120068605 | Motor Drive Circuit and Illumination Apparatus - A motor-drive circuit includes: an output transistor configured to supply a drive current to a motor for a cooling fan; a switching-control circuit configured to control switching of the output transistor so that the motor rotates in a first direction, or rotates in a second direction opposite to the first direction; and a switching circuit configured to, when a first time has elapsed since start of rotation of the motor in the first direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the first direction and thereafter rotates in the second direction, and configured to, when a second time has elapsed since start of rotation of the motor in the second direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the second direction and thereafter rotates in the first direction. | 03-22-2012 |
| 20120068321 | SEMICONDUCTOR DEVICE - The invention enhances resistance to a surge in a semiconductor device having a semiconductor die mounted on a lead frame. An N type embedded layer, an epitaxial layer and a P type semiconductor layer are disposed on the front surface of a P type semiconductor substrate forming an IC die. A metal thin film is disposed on the back surface of the semiconductor substrate, and a conductive paste containing silver particles and so on is disposed between the metal thin film and a metal island. When a surge is applied to a pad electrode disposed on the front surface of the semiconductor layer, the surge current flowing from the semiconductor layer into the semiconductor substrate runs toward the metal island through the metal thin film. | 03-22-2012 |
| 20120061757 | SEMICONDUCTOR DEVICE - An ESD tolerance of an LDMOS transistor is improved. An N+ type source layer shaped in a ladder and having a plurality of openings in its center is formed in a surface of a P type base layer using a gate electrode and a resist mask. A P+ type contact layer is formed to be buried in the opening. At that time, a distance from an edge of the opening, that is an edge of the P+ type contact layer, to an edge of the N+ type source layer is set to a predetermined distance. The predetermined distance is equal to a distance at which an HBM+ESD tolerance of the LDMOS transistor, which increases as the distance increases, begins to saturate. | 03-15-2012 |
| 20120056596 | REMAINING BATTERY POWER CALCULATION CIRCUIT - A remaining battery power calculation circuit includes: a detection unit configured to detect an output voltage of a battery; a data storage unit configured to store data in an associated manner with each of a plurality of current values for charge or discharge of the battery, the data indicating a relationship between the output voltage and a ratio of remaining power of the battery to a capacity of the battery in a case where the battery is charged or discharged with each of the plurality of current values; and a first calculation unit configured to calculate a charging/discharging current of the battery based on the data and the output voltage. | 03-08-2012 |
| 20120032307 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - In a CSP type semiconductor device, the invention prevents a second wiring from forming a narrowed portion on a lower surface of a step portion at the time of forming the second wiring that is connected to the back surface of a first wiring formed near a side surface portion of a semiconductor die on the front surface and extends onto the back surface of the semiconductor die over the step portion of a window that is formed from the back surface side of the semiconductor die so as to expose the back surface of the first wiring. A glass substrate is bonded on a semiconductor substrate on which a first wiring is formed on the front surface near a dicing line with an adhesive resin being interposed therebetween. The semiconductor substrate is then etched from the back surface to form a window having step portions with inclined sidewalls around the dicing line as a center. A second wiring is then formed so as to be connected to the first wiring exposed in the window and extend onto the back surface of the semiconductor substrate over the step portions of the window except part of the step portions on the dicing line and near the dicing line, which extend perpendicular to the dicing line. | 02-09-2012 |
| 20120026339 | WHITE BALANCE ADJUSTMENT METHOD AND IMAGING DEVICE - A method includes the steps of emitting infrared light of a predetermined wavelength to an object, receiving infrared light of a predetermined wavelength different from the infrared light emitted from the object, and adjusting white balance of an image output from a camera at this time, thereby showing the incident infrared light as white. The method further includes the steps of emitting white visible light to the object from an RGB light source, receiving visible light emitted from the object, and adjusting the intensity of the RGB light source for each of R, G, and B, thereby adjusting white balance of a captured image. | 02-02-2012 |
| 20120026153 | Liquid Crystal Driving Circuit - A liquid-crystal-driving circuit includes: a plurality of resistors connected in series between a first and second potentials; one or more voltage follower circuits to impedance-convert one or more intermediate potentials between the first and second potentials, to be outputted, respectively, the intermediate potentials generated at one or more connection points between the resistors, respectively; a common-signal-output circuit to supply common signals to common electrodes of a liquid-crystal panel, respectively, the common signals each being at the first and second potentials, and the intermediate potentials; and a segment-signal-output circuit to supply segment signals to segment electrodes of the panel, respectively, the segment signals each being at the first and second potentials, and the intermediate potentials according to the common signals, the segment-signal output circuit to change the potentials of the segment signals in a ramp form, at least if the potentials of the segment signals are changed with a maximum-possible-potential difference. | 02-02-2012 |
| 20120025893 | SWITCHED CAPACITOR CIRCUIT - A switched capacitor circuit includes a capacitor and switches located on an input side and an output side of the capacitor. The switched capacitor circuit also includes an operational amplifier of a later stage which receives an output of the capacitor, wherein a current value of a current supplied to the operational amplifier is switched according to at least one open/closed state of at least one of the switches. | 02-02-2012 |
| 20120025359 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - A conventional semiconductor device has a problem that a frame constituting a heat sink is expensive and the heat sink is highly likely to come off a resin package. A semiconductor device of the present invention reduces the frame price because a heat sink is formed by subjecting a frame with a uniform thickness to pressing or something similar. Furthermore, the heat sink is less likely to come off a resin package because step regions of the heat sink are pressed as connection regions to be connected to the other frame in which leads are arranged, and thereby, resin constituting the resin package goes around the step regions and reaches up to back surfaces of the respective step regions. Moreover, a structure which makes the heat sink much less likely to come off is realized because recessed portions are arranged in the step regions of the heat sink. | 02-02-2012 |
| 20120021568 | METHOD OF MANUFACTURING CIRCUIT DEVICE - Provided is a method of manufacturing a circuit device in which a circuit element is resin-sealed with sealing resins formed integrally with each other. In the present invention, a resin sheet and a circuit board are housed in a cavity of a mold, and thereafter a first sealing resin formed of a tablet in melted form is injected into the cavity. At the time of injecting the first sealing resin, a second sealing resin formed of the resin sheet in melted form is not yet cured and is maintained in liquid form. Accordingly, the injected first sealing resin and the second sealing resin are mixed at the boundary therebetween, preventing the generation of a gap in the boundary portion and therefore preventing the deterioration of the moisture resistance and withstand voltage at the boundary portion. | 01-26-2012 |
| 20120018906 | CIRCUIT DEVICE AND METHOD OF MANUFACTURING THE SAME - In a circuit device of the present invention, the lower surface side of a circuit board and part of side surfaces thereof are covered with a second resin encapsulant, and the upper surface side and the like of the circuit board are covered with a first resin encapsulant. Since heat dissipation to the outside of the circuit device is achieved mainly through the second resin encapsulant, a particle size of filler contained in the second resin encapsulant is made larger than a particle size of filler contained in the first resin encapsulant. Heat dissipation to the outside of the circuit device is greatly improved. | 01-26-2012 |
| 20120018849 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - In a CSP type semiconductor device, the invention prevents a second wiring from forming a protruding portion toward a dicing line at the time of forming the second wiring that is connected to the back surface of a first wiring formed near a side surface portion of a semiconductor die on the front surface and extends onto the back surface of the semiconductor die over a step portion in a window that is formed from the back surface side of the semiconductor die so as to expose the back surface of the first wiring. A glass substrate is bonded on a semiconductor substrate on which a first wiring is formed on the front surface near a dicing line with a resin as an adhesive being interposed therebetween. The semiconductor substrate is then etched from the back surface to form a window having inclined sidewalls with the dicing line as a center. A second wiring is then formed so as to be connected to the back surface of the first wiring exposed in the window and extend over one of the sidewalls of the window, that extends perpendicular to the dicing line, onto the back surface of the semiconductor substrate. | 01-26-2012 |
| 20120018202 | CIRCUIT DEVICE - In a circuit device of the present invention, the lower surface side of a circuit board is covered with a second resin encapsulant, and the upper surface side and the like of the circuit board are covered with a first resin encapsulant. Since heat dissipation to the outside of the circuit device is achieved mainly through the second resin encapsulant, a particle size of filler contained in the second resin encapsulant is made larger than a particle size of filler contained in the first resin encapsulant. Heat dissipation to the outside of the circuit device is greatly improved. | 01-26-2012 |
| 20120018201 | CIRCUIT BOARD AND MANUFACTURING METHOD THEREOF, CIRCUIT DEVICE AND MANUFACTURING METHOD THEREOF, AND CONDUCTIVE FOIL PROVIDED WITH INSULATING LAYER - Provided are a circuit board easy to process by laser and a manufacturing method thereof A circuit board of the present invention includes a substrate, an insulating layer covering an upper surface of the substrate, and a conductive pattern of a predetermined shape formed on an upper surface of the insulating layer. The insulating layer is made of a resin material highly filled with a filler made of silica. Further, a colorant made of an inorganic material is added to the resin material. Accordingly, when a laser is radiated onto the insulating layer in order to perform cutting and removing processing, the insulating layer is removed because the laser is absorbed by the colored resin material. | 01-26-2012 |
| 20120013397 | SEMICONDUCTOR DEVICE - A noise removal circuit is provided having a first holding circuit ( | 01-19-2012 |
| 20110316607 | SWITCHING CONTROL CIRCUIT AND SWITCHING POWER SUPPLY CIRCUIT - A switching-control circuit, which causes a first transistor, having an input electrode to be applied with an input voltage and an output electrode connected to an inductor and a diode, to be turned on and kept on for a predetermined time period, includes: a comparison circuit to compare a feedback voltage corresponding to an output voltage with a reference voltage; a detecting circuit to detect a switching period of the first transistor; and a driving circuit to turn off a second transistor connected in parallel to the diode as well as turn on the first transistor to be kept on for the predetermined time period, and thereafter, turn off the first and second transistors, when the feedback voltage becomes lower than the reference voltage, and turn off the first transistor as well as turn on the second transistor, when the switching period becomes longer than a predetermined period. | 12-29-2011 |
| 20110316135 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - When a metal ribbon is ultrasonic-bonded, a peripheral area of an island and hanging pins provided in the periphery of the island need to be clamped by use of clampers of a bonder to prevent the island from being lifted up. However, if no sufficiently-wide peripheral area of the island can be secured or no hinging pins can be provided due to the miniaturization of the device, there arises a problem that the island cannot be clamped. A protrusion, which protrudes toward a lead and has the same height as an end portion of the lead, is provided to an edge of the island opposed to the lead. Accordingly, when the protrusion and the end portion of the lead are simultaneously pressed by the damper, it is possible to prevent the island from being lifted up even when no hanging pin or no clamp area around the island is provided. | 12-29-2011 |
| 20110315986 | SEMICONDUCTOR INTEGRATED CIRCUIT - Whether there is a defect such as chipping of a die or separation of a resin in a wafer level package is electrically detected. A peripheral wiring is disposed along four peripheries of a semiconductor substrate outside a circuit region and pad electrodes P | 12-29-2011 |
| 20110309476 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - In a semiconductor device including a protection diode for preventing electrostatic breakdown employing a low capacitance protection diode, an occupation area of a Zener diode as a voltage limiting element is not needed on a front surface of a semiconductor substrate. A P+ type embedded diffusion layer is formed in a P+ type semiconductor substrate. This is then covered by a non-doped first epitaxial layer. A high resistivity N type second epitaxial layer is then formed on the first epitaxial layer. The second epitaxial layer is divided by a P+ isolation layer into a first protection diode forming region and a second protection diode forming region. An N+ type embedded layer extending from the front surface of the first epitaxial layer of the first protection diode forming region to the first epitaxial layer and the second epitaxial layer, and so on are then formed. A Zener diode is formed by a P+ type upward diffusion layer extending from the P+ type embedded diffusion layer and the N+ type embedded layer. | 12-22-2011 |
| 20110309408 | SEMICONDUCTOR DEVICE AND METHOD OF PRODUCING SAME - A semiconductor device provided with: an island and an island which are separated from each other; leads which approach the islands at one end; a control element which is attached to the island and is connected to a lead through a thin metal wire; and a switching element which is attached to the island and is connected to the lead through a metal wire. Further, the thin metal wire and the thin metal wire are arranged so as to the intersect. | 12-22-2011 |
| 20110307537 | DIGITAL FILTER - A digital filter has a plurality of filters, wherein each filter performs coefficient multiplication and delay processing for an input signal and an output signal, obtains the output signal from the input signal, and includes a plurality of coefficient multipliers for multiplying a signal by a predetermined coefficient. The digital filter also includes a plurality of delay circuits for delaying a signal, and an adder for adding a plurality of signals. A first RAM stores a plurality of sets of coefficient data for a plurality of coefficient multipliers of the first filter and stores delay data for the delay circuit of the second filter. A second RAM stores a plurality of sets of coefficient data for a plurality of coefficient multipliers of the second filter and stores delay data for the delay circuit of the first filter. | 12-15-2011 |
| 20110304285 | MOTOR DRIVE CIRCUIT - A motor drive circuit includes: a digital filter configured to attenuate amplitude in a frequency band including a resonance frequency of an actuator in a target current signal, the target current signal being a digital signal indicative of a target value of a drive current, the drive current being supplied to a voice coil motor configured to drive the actuator; a digital-analog converter configured to convert an output signal of the digital filter into an analog signal, and output the converted analog signal as a current control signal; and a drive circuit configured to supply the drive current to the voice coil motor according to the current control signal. | 12-15-2011 |
| 20110298410 | LOOP GAIN ADJUSTING CIRCUIT - In an adder circuit, a sine wave is added to a compensation signal which is generated based on a position detection signal of a member to be driven and for compensating a position of a lens which is the member to be driven. An absolute value integrating circuit integrates absolute values of signals before and after the adder circuit adds the sine wave. The two obtained integrated values are compared by a comparator circuit, and a gain adjusting circuit adjusts a gain of an amplifier which amplifies the compensation signal so that the two integrated values are equal to each other. | 12-08-2011 |
| 20110298395 | CONTROL CIRCUIT OF LIGHT-EMITTING ELEMENT - A control circuit of a light-emitting element comprises a rectifying unit which full-wave rectifies an alternating current power supply, a clock generator which generates and outputs a clock signal (CLK), a first comparator which compares a comparison voltage (CS) corresponding to a current flowing to the light-emitting element and a reference voltage (REF), and a switching element which is set to an ON state in synchronization with the clock signal (CLK) and which is set to an OFF state when the comparison voltage (CS) becomes greater than the reference voltage (REF) at the first comparator, to switch the current flowing to the light-emitting element. In this structure, a period of the clock signal (CLK) generated in the clock generator is varied, to reduce or inhibit noise. | 12-08-2011 |
| 20110279692 | CONTROL CIRCUIT FOR IMAGE-CAPTURING DEVICE - Performing data processing more effectively for camera shake correction is desirable. Movement of an image-capturing device is compensated on the basis of displacement velocity of the image-capturing device detected by a displacement velocity detector and position regarding a focus adjustment member of the image-capturing device detected by a position detector. An input data format converter converts the displacement velocity detected at the displacement velocity detector from fixed-point format to floating-point format and converts the detected position of the focus member to floating-point data. Furthermore, a gyro filter uses data processing in floating-point format to calculate displacement data for a required amount the image-capturing device is to be displaced and a Hall filter uses data processing in floating-point format to generate drive data for the focus adjustment member. Then, the drive data in floating-point format from the Hall filter is converted to drive data in fixed-point format. | 11-17-2011 |
| 20110279069 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running, after the running of the linear vibration motor has terminated; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. An induced voltage detector detects an induced voltage occurring in the coil. A comparator has a function as a hysteresis comparator in which the output level does not vary in a predetermined dead band, and the comparator outputs a high-level signal or a low-level signal during the high impedance period. When an in-phase signal is consecutively outputted from the comparator during the consecutive high-impedance periods, the drive signal generating unit determines that the linear vibration motor has come to a stop. | 11-17-2011 |
| 20110279068 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, a drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. An induced voltage detector detects an induced voltage occurring in the coil. After a running of the linear vibration motor has terminated, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. The induced voltage detector detects the induced voltage occurring in the coil during the high impedance period. | 11-17-2011 |
| 20110279067 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, a differential amplifier circuit includes an operational amplifier in which an P-channel type transistor is used as a transistor that receives an input voltage, and the differential amplifier circuit detects an induced voltage occurring in a coil. Before the H-bridge circuit is controlled to a high impedance state, a drive signal generating unit turns on a first transistor and a second transistor, and delivers a regenerative current through the coil, the first transistor, the second transistor and the power supply potential. | 11-17-2011 |
| 20110266965 | CONTROL CIRCUIT OF LIGHT-EMITTING ELEMENT - A control circuit of a light-emitting element comprises a rectifying unit ( | 11-03-2011 |
| 20110260669 | MOTOR DRIVE CIRCUIT - A motor drive circuit to drive a motor coil based on duty ratio of a PWM signal, includes: a first pulse signal generating circuit to generate a first pulse signal for each time period, the time period being equal to 1/n of a time period during which the PWM signal is at one logic level; a counter to change a count value based on the first pulse signal; a drive signal output circuit to output a drive signal of one logic level when the count value is not a predetermined value, and output the drive signal of the other logic level when the count value reaches the predetermined value; a drive circuit to perform PWM driving for the motor coil based on the duty ratio of the drive signal; and a setting circuit to set, in the counter, such a count value as to decrease a current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is decreased, and set, in the counter, such a count value as to increase the current passing through the motor coil, for each period of the PWM signal, in a time period during which the current passing through the motor coil is increased, out of a time period during which the current passing through the motor coil is changed in direction. | 10-27-2011 |
| 20110260651 | CONTROL CIRCUIT OF LIGHT-EMITTING ELEMENT - A control circuit of a light-emitting element comprises a rectifying unit ( | 10-27-2011 |
| 20110255565 | LASER LIGHT DETECTION CIRCUIT - The invention provides a laser light detection circuit that prevents a peak output occurring when the circuit switches between the operation stop mode and the operation mode so as to prevent the breakdown or malfunction of the next-connected circuit. A laser light detection circuit has a differential amplifier that amplifies and outputs a signal corresponding to the intensity of laser light, a drive transistor having a base to which the output of the differential amplifier is applied, a second constant-current source connected to the emitter of the drive transistor, an output transistor having a base connected to the emitter of the drive transistor, a bypass transistor connected between the emitter of the drive transistor and the ground, and a control circuit. The control circuit forms a bypass current route from the second constant-current source to the ground through the bypass transistor by turning on the bypass transistor when the circuit switches from the operation stop mode to the operation mode. | 10-20-2011 |
| 20110235224 | SEMICONDUCTOR INTEGRATED CIRCUIT - A circuit device connected between a neighboring pair of terminals in a semiconductor integrated circuit is protected from electrostatic damage due to a surge voltage when the surge voltage is applied between the neighboring pair of terminals. The semiconductor integrated circuit is formed to include terminals P | 09-29-2011 |
| 20110206210 | STEREO SIGNAL PROCESSING CIRCUIT - A noise level of an output signal is maintained low. An adjacent interference detecting unit compares a signal level of a wide band signal which is a desired station signal of a relatively wide band and a signal level of a narrow band signal which is a desired station signal of a relatively narrow band, and judges that adjacent interference has occurred when the signal level of the narrow band signal is less than or equal to a predetermined level even though the signal level of the wide band signal is greater than or equal to a predetermined level. A variable amplifier ( | 08-25-2011 |
| 20110205795 | MEMORY DEVICE - With a serial interface memory device of this invention, a read-out rate of data is increased, while an increase in a size of a circuit is suppressed. An EEPROM is provided with a memory cell array storing data, a row address decoder and a column address decoder that select an address of the memory cell array in accordance with an address signal serially inputted in synchronization with a clock, sense amplifiers SA | 08-25-2011 |
| 20110204972 | AMPLIFYING CIRCUIT - To efficiently obtain two outputs including one at a normal level and the other at an excessive level. An input signal input to the negative input terminal of an operational amplifier ( | 08-25-2011 |
| 20110204952 | CURRENT DETECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - The invention provides a current detection circuit for a transistor, that does not influence a current flowing through the transistor, and minimizes a power loss, an increase of the pattern area and so on. A current detection circuit includes a wiring connected to a MOS transistor and forming a current path of a current of the MOS transistor, a current detection MOS transistor of which the gate is connected to the wiring, that flows a current corresponding to the potential of the gate, and a current detector detecting a current flowing through the current detection MOS transistor. The current detection circuit is configured including a load resistor connected to the current detection MOS transistor and a voltage detection circuit detecting a drain voltage of the current detection MOS transistor. | 08-25-2011 |
| 20110204834 | MOTOR DRIVING CIRCUIT - A motor-driving circuit includes: a plurality of output transistors; a first-comparator circuit to compare a voltage of each phase of driving coils of a plurality of phases in a motor, with a neutral-point voltage; a position-detecting circuit to detect a rotor position of the motor based on a comparison result of the first-comparator circuit; a switching-control circuit to supply switching signals to the plurality of output transistors according to the rotor position; and a current-limiting circuit to limit the driving currents to a first-current value so that the motor rotates at a target-rotation speed when the current-limiting circuit determines that the motor is rotating at a speed higher than or equal to a predetermined-reference-rotation speed, and limit the driving currents to a second-current value smaller than the first-current value when the current-limiting circuit determines that the motor is not rotating at the speed higher than or equal to the predetermined-reference-rotation speed. | 08-25-2011 |
| 20110199145 | SWITCHING CONTROL CIRCUIT - A switching-control circuit to control switching of a transistor whose input electrode is applied with an input voltage, and turn off the transistor, when an output current from the transistor is greater than a reference current, includes: a reference-voltage-generating circuit to generate such a first-reference voltage that the reference current is reduced with reduction in an output voltage; a comparing circuit to compare a voltage corresponding to the output current with the first-reference voltage; and a driving circuit to turn on/off the transistor based on a feedback voltage corresponding to the output voltage and a second reference voltage corresponding to a target level so that the output voltage reaches the target level, when the comparing circuit determines that the output current is smaller than the reference current, and turn off the transistor when the comparing circuit determines that the output current is greater than the reference current. | 08-18-2011 |
