| Patent application number | Description | Published |
|---|
| 20080204107 | MOS RESISTANCE CONTROLLING DEVICE AND MOS ATTENUATOR - A MOS resistance controlling device includes: a plurality of MOS transistors having a first MOS transistor to N-th (the integer N is larger than 1) MOS transistor being serially connected, the source of the first MOS transistor being set to a first reference potential, the drain the N-th MOS transistor being set to a second reference potential, and the drain of an I-th MOS transistor being connected to the source of an I+1-th MOS transistor, where I is an integer from 1 to N−1; a current source which is electrically disposed at connection node between the drain of the N-th MOS transistors and the second reference potential; and an operational amplifier having a first input terminal being supplied with a third reference potential, a second input terminal connected with the connection node and an output terminal being connected with gates of the MOS transistors. | 08-28-2008 |
| 20080238495 | FREQUENCY SYNTHESIZER AND WIRELESS COMMUNICATION DEVICE UTILIZING THE SAME - A frequency synthesizer includes a voltage-controlled oscillator to output an oscillation signal of a oscillating frequency in correspondence with a oscillation controlling voltage that is input to the oscillator, a first frequency-divider to subject the oscillation signal to frequency-division and output a first frequency signal, a second frequency-divider to subject the first frequency signal to frequency-division and output a second frequency signal, a controlling voltage generator to generate the oscillation controlling voltage corresponding to a phase difference between a reference clock signal and the second frequency signal, a frequency detector to detect a frequency difference between the second frequency signal and the reference clock signal, and a controller which controls a free-running frequency of the first frequency divider to minimize the frequency difference. | 10-02-2008 |
| 20080311867 | MOS RESISTANCE CONTROLLING DEVICE, MOS ATTENUATOR AND RADIO TRANSMITTER - A MOS resistance controlling device includes: a plurality of MOS transistors having a first MOS transistor to N-th (the integer N is larger than 1) MOS transistor being serially connected, the source of the first MOS transistor being set to a first reference potential, the drain the N-th MOS transistor being set to a second reference potential, and the drain of an I-th MOS transistor being connected to the source of an I+1-th MOS transistor, where I is an integer from 1 to N−1; a current source which is electrically disposed at connection node between the drain of the N-th MOS transistors and the second reference potential; and an operational amplifier having a first input terminal being supplied with a third reference potential, a second input terminal connected with the connection node and an output terminal being connected with gates of the MOS transistors. | 12-18-2008 |
| 20090042521 | RADIO TRANSMITTER USING CARTESIAN LOOP - A radio transmitter including a combiner which combines input I/Q signals with feedback I/Q signals, a power amplifier which amplifies the quadrature modulated signal, a detector which detects amplitude and phase differences between the input and feedback I/Q signals, a switch to turn on and off the feedback I/Q signals, a generator to generate control signals which minimizes the amplitude difference and the phase difference, in a state where a transmission power is set, during for a period during which the switch is turned off, an amplitude adjuster which adjusts an amplitude of the feedback RF signal, during a period during which the switch is turned on, and a phase adjuster which adjusts a phase of the local signal, during the period during which the switch is turned on. | 02-12-2009 |
| 20090046817 | RECEIVING APPARATUS AND METHOD - A receiving apparatus includes a unit detecting a specific-bit sequence included in a data sequence, a unit counting, as a count value n | 02-19-2009 |
| 20090052417 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes: a detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the detection part corresponds to a predetermined identifier; and a power source control unit controlling a power source based on a result of a judgment in the judgment part. | 02-26-2009 |
| 20090067356 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes: a packet detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the packet detection part corresponds to a predetermined identifier; and a power source control unit controlling power supply from a power source based on a result of a judgment in the judgment part. | 03-12-2009 |
| 20090111377 | FREQUENCY CONVERTER AND RECEIVER AND TRANSMITTER USING THE SAME - A frequency converter includes a voltage-current converter circuit which generates a positive-phase input current signal and a negative-phase input current signal, a switching circuit which switches between the positive-phase input current signal and the negative-phase input current signal according to a positive-phase local oscillator signal and a negative-phase local oscillator signal to generate a positive-phase output current signal and a negative-phase output current signal, an amplifier circuit which current-voltage converts and amplifies the positive-phase output current signal and negative-phase output current signal to generate a positive-phase output voltage signal and a negative-phase output voltage signal, and a plurality of CR circuits which are inserted at least either between the voltage-current converter circuit and the switching circuit or between the switching circuit and the amplifier circuit and each of which includes at least one capacitor through which high-frequency components pass and at least one resistance through which low-frequency noise components pass. | 04-30-2009 |
| 20090132836 | POWER-SAVING CONTROL APPARATUS AND METHOD - A power-saving control apparatus includes a memory storing first to Nth different authentication codes, determines, every time a signal including an authentication code is received, whether the authentication code in the received signal is a valid code which matches one of the authentication codes in the memory, outputs an operation signal to a main apparatus when the authentication code in the received signal is determined to be the valid code, and generates a new authentication code, when (a) the number of times the authentication code in each received signal matches a first authentication code of the authentication codes in the memory is equal to a predetermined value or (b) the authentication code in the received signal matches a second or subsequent authentication code of the authentication codes in the memory, to delete one of the authentication codes in the memory, and to store the new authentication code in the memory. | 05-21-2009 |
| 20090184690 | CHARGER - A charger includes: a rectifier to rectify a received radio wave to generate a charging current; a potential generator to generate a bias voltage setting an operating point of the rectifier; and a controller to supply the bias voltage generated by the potential generator when an output voltage of the rectifier is equal to or larger than a predetermined value. | 07-23-2009 |
| 20090195353 | CONTROL DEVICE AND CONTROLLED DEVICE - A control device being a control device communicating with a controlled device to control the controlled device includes: a first memory to store first authentication information for authenticating the controlled device; a second memory to store second authentication information for making the controlled device authenticate itself; a determination unit to compare third authentication information sent from the controlled device for specifying the controlled device with the first authentication information; a calculator to perform calculation processing on the first authentication information or the third authentication information using the second authentication information to generate a calculated value; a transmitter to transmit, when the determination unit determines that the first authentication information and the third authentication information are the same, the calculated value to the controlled device; and a memory controller to update the first authentication information. | 08-06-2009 |
| 20090199292 | CONTROL DEVICE, CONTROLLED DEVICE, AND CONTROL METHOD - A control device communicating with a controlled device to control the controlled device includes a first memory to store first authentication information for activation of the controlled device, a second memory to store a key for encryption, a generator to generate third authentication information by encrypting second authentication information transmitted by the controlled device in response to the first authentication information using the key stored in the second memory, a transmitter to transmit the first authentication information or the third authentication information to the controlled device, and a memory controller to store the second authentication information or the third authentication information as first authentication information for next authentication in the first memory. | 08-06-2009 |
| 20090295434 | SIGNAL RECEIVING DEVICE - A signal receiving device includes: a first conversion unit comprising a first input terminal to which a signal including a voltage signal and a reference voltage is inputted, and a first output terminal which output a first current signal voltage-current converted from the signal; a second conversion unit comprising a second input terminal to which the reference voltage is inputted, and a second output terminal which output a second current signal voltage-current converted from the reference voltage; a current mirror circuit comprising a third input terminal to which the second current signal is inputted, and a third output terminal which output a third current signal corresponding to the second current signal; and an output unit connected to both the first and third output terminals. | 12-03-2009 |
| 20090302958 | DIGITALLY CONTROLLED OSCILLATOR AND PHASE LOCKED LOOP CIRCUIT USING THE DIGITALLY CONTROLLED OSCILLATOR - A digitally controlled oscillator includes a differential inductor including a positive terminal which outputs a positive-phase oscillation signal, a negative terminal which outputs a negative-phase oscillation signal, and a center tap, and including a first contact point in an arbitrary position between the positive terminal and the center tap, and a second contact point in a position corresponding to the first contact point between the negative terminal and the center tap, a first variable capacitor bank connected between the positive terminal and the negative terminal and including a plurality of first variable capacitors which switch capacitance between two values according to a first digital control code, and a second variable capacitor bank connected between the first contact point and the second contact point and including a plurality of second variable capacitors which switch capacitance between two values according to a second digital control code. | 12-10-2009 |
| 20100039159 | CONTROL DEVICE AND CONTROL METHOD - This control device includes: a rectifier to rectify a received signal; an amplifier having an amplifying element to amplify the signal rectified by the rectifier and an assisting element being connected to the amplifying element to assist the amplifying element; a determination unit to determine presence or absence of the signal amplified by the amplifier; and a controller to control the connection of the assisting element with the amplifying element at a predetermined timing. | 02-18-2010 |
| 20100073222 | FMWC SIGNAL GENERATOR AND RADAR APPARATUS USING FMCW SIGNAL GENERATOR - An FMCW signal generator includes a frequency divider to divide the FMCW signal at a preset dividing ratio, a reference signal generator to periodically generate a reference signal at a second time interval not less than a loop time constant set for a PLL, a frequency of the reference signal being discretely swept within a range of fc±Δf (fc is a center frequency, and Δf is a frequency sweep width) at a first time interval not more than the loop time constant, a comparison unit to compare the frequency divided signal with the reference signal to generate a comparison result signal corresponding to a phase difference between the frequency divided signal and the reference signal, a loop filter to filter the comparison result signal to generate a control voltage signal, and a VCO to have an oscillation frequency thereof controlled by the control voltage signal. | 03-25-2010 |
| 20100164564 | STARTING APPARATUS AND STARTING METHOD - A starting apparatus includes: a storage unit storing an identifier; a rectifying unit rectifying a reception signal; a generating unit comparing the reception signal rectified in the rectifying unit to a reference signal and generating a digital signal from the reception signal; a judging unit judging whether or not the digital signal contains information of the identifier; a reference changing unit changing the reference signal when the judging unit judges that the reception signal does not contain information of the identifier; and a start instructing unit instructing start of an electric appliance when the judging unit judges that the reception signal contains information of the identifier. | 07-01-2010 |
| 20100164633 | PLL CIRCUIT AND RADIO COMMUNICATION APPARATUS - A PLL circuit includes: a voltage-controlled oscillator including: a first oscillating portion configured to generate first differential signals; and a second oscillating portion configured to generate second differential signals with a phase difference of 90 degrees from the first differential signals; a phase detector configured to compare phases of third differential signals based on the first and second differential signals with a phase of a reference signal; and a loop filter configured to generate a control voltage for controlling the voltage-controlled oscillator based on a result of the comparison in the phase detector. | 07-01-2010 |
| 20100203851 | WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission device includes an adding/subtracting unit configured to subtract a second signal and a third signal from a first signal to generate the second signal; a modulating unit configured to modulate the second signal to generate a fourth signal; a demodulating unit configured to demodulate the fourth signal to generate the third signal; and a transmitting unit configured to transmit the fourth signal. | 08-12-2010 |
| 20100215116 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus for performing communication using a first communication scheme which transmits a signal using amplitude shift keying and a second communication scheme which suppresses communication with others except a communication counterpart by transmitting a transmission suppression signal before communication is started. The apparatus includes: a first signal generation unit configured to generate transmission data; a modulation unit configured to generate first and second signals having different amplitudes by amplitude-shift keying the transmission data; a second signal generation unit configured to generate the transmission suppression signal having a signal length corresponding to that of the first signal; and a transmission unit configured to transmit the transmission suppression signal at the timing when the first signal is transmitted. | 08-26-2010 |
| 20100225397 | AMPLIFIER AND RADIO - An amplifier includes: a substrate; first to fourth amplifying units arranged on the substrate and each having first and second terminals, and each amplifying first and second signals to generate first and second amplified signals; a first inductive line arranged on the substrate, connecting the first terminal of the first amplifying unit and the first terminal of the second amplifying unit, and having a linear portion and a bending portion; a second inductive line arranged on the substrate, connecting the second terminal of the second amplifying unit and the first terminal of the third amplifying unit, and having a linear portion and a bending portion; a third inductive line arranged on the substrate, connecting the second terminal of the third amplifying unit and the first terminal of the fourth amplifying unit, and having a linear portion and a bending portion; a fourth inductive line arranged on the substrate, connecting the second terminal of the fourth amplifying unit and the second terminal of the first amplifying unit, and having a linear portion and a bending portion; and a fifth inductive line which establishes magnetic field coupling with the first to fourth inductive lines, and has third and fourth terminals, combines the plurality of the first amplified signals amplified to output the first combined signal from the third terminal, and combines the plurality of the second amplified signals to output the second combined signal from the fourth terminal. | 09-09-2010 |
| 20100231431 | ELECTRONIC SYSTEM - An electronic system includes: an AC-DC converter to convert an AC voltage into a DC voltage and to supply the DC voltage to a secondary battery; a first detector to detect a remaining amount of the secondary battery; a transmitter to transmit a signal corresponding to the remaining amount of the secondary battery; a receiver to receive the signal transmitted by the transmitter; and a controller to control the AC-DC converter using the signal received by the receiver. | 09-16-2010 |
| 20100237829 | ASSEMBLED BATTERY SYSTEM AND ASSEMBLED BATTERY PROTECTION DEVICE - An assembled battery system includes an assembled battery including a plurality of electric cell blocks connected in series, the electric cell blocks each including at least one nonaqueous electrolyte secondary battery provided with a negative electrode current collector formed of aluminum or an aluminum alloy, a voltage measuring unit configured to measure a plurality of voltages of the electric cell blocks, a controller which controls charge/discharge of the assembled battery in accordance with the measured voltages, and bypass circuits connected in parallel to the electric cell blocks, the bypass circuits each bypassing a current that flows from a negative electrode of one of the electric cell blocks to a positive electrode of the one of electric cell blocks when the measured voltage of the one of electric cell blocks is a negative value not greater than a threshold value. | 09-23-2010 |
| 20110116558 | WIRELESS TRANSMISSION APPARATUS USING CARTESIAN LOOP - In one embodiment, a wireless transmission apparatus is disclosed. The apparatus includes a generator unit, an amplitude adjuster unit, a phase adjuster unit, and a setting unit. The generator unit generates an amplitude control signal that minimizes an amplitude difference and a phase control signal that minimizes a phase difference in a state in which a power is set during an OFF period of a switch. The amplitude adjuster unit adjusts an amplitude of a feedback RF signal according to the amplitude control signal during an ON period of the switch. The phase adjuster unit adjusts a phase of a local signal according to the phase control signal during the ON period. The setting unit sets, for a Cartesian loop, a first loop gain when the switch is OFF, and a second loop gain higher than the first loop gain when the switch is turned from OFF to ON. | 05-19-2011 |
