Patent application number | Description | Published |
20090051393 | Low side driver - An output driver circuit has an input, an output node, and first and second transistors coupled in series between the output node and a first source of operating potential. Parasitic diodes of the first and second transistors are anti-serially coupled. The output driver circuit has first and second control circuits coupled to control the first and second transistors respectively. The first transistor is controlled as a controlled current source depending on a signal at the input during normal conditions when the current that flows through the output is in a first direction, and the second control circuit controls the second transistor to prevent unwanted DC current at the output from flowing through the output in a second direction. The first and second transistors are also controlled to limit unwanted transient currents during an EMC disturbance substantially symmetrically. | 02-26-2009 |
20090066403 | EMC PROTECTION CIRCUIT - A protection circuit for protecting an electronic circuit against EMC disturbances and/or negative transient overvoltage pulses comprises a switch in series between a power supply and the electronic circuit to be protected; a comparator for comparing a first operating parameter with a second operating parameter and producing a comparison signal, the comparison signal being used as a control signal for controlling opening and closing of the switch; and a delay circuit adapted for delaying closing of the switch. A corresponding method is also provided. | 03-12-2009 |
20090267673 | SIGNAL GENERATION CIRCUIT - A signal generation circuit that uses a waveform generation mechanism to generate predetermined waveform(s) when triggered. A triggering mechanism is configured to repeatedly trigger the waveform generation mechanism at times that are dependent on data provided by a data source. The predetermined waveform may be a bandwidth-limited pulse, but might also be a rising edge or a falling edge of a pulse. Various consecutive waveforms may be summed together to thereby formulate a continuous signal. The waveform may have particular characteristics by design. | 10-29-2009 |
20110115520 | CAPACITOR TEST METHOD AND CIRCUIT THEREFOR - In one embodiment, a closed loop control system is caused to operate in an open loop configuration. At some time while operating in the open loop configuration the system detected the presence or absence of a.c. signals in an output signal of the system in order to detect the presence or absence of a failure of a control loop element, such as an output capacitor. | 05-19-2011 |
20110261652 | SELF-TUNING ACOUSTIC MEASUREMENT SYSTEM - In one embodiment, an acoustic distance measurement system can dynamically adjust its measurement frequency to a frequency that is within a preselected bandwidth of the resonant frequency of an acoustic transducer used in making acoustic distance measurements. | 10-27-2011 |
20110267924 | ACOUSTIC DISTANCE MEASUREMENT SYSTEM HAVING CROSS TALK IMMUNITY - In one embodiment, an acoustic distance measurement system can use a modulation pattern to modulate a carrier wave. The modulated carrier wave may be transmitted to an acoustic transducer. An echo of the transmitted signal can be detected by correlating the received signal with the modulation pattern. Subsequent to detecting sufficient correlation between the received signal and modulation pattern, a distance determination can be made to determine the distance to the object that produced the received echo. | 11-03-2011 |
20120120768 | SEMICONDUCTOR DEVICE AND METHOD OF FORMING SAME FOR CORRELATION DETECTION - In an embodiment a semiconductor device correlates a received signal with a known pattern. A correlation output is used as a basis for forming a confidence reference level. The confidence reference level and the correlation output are compared to identify a peak in the received signal indicating that a present signal state of the received signal contains the known pattern. | 05-17-2012 |
20130135032 | SEMICONDUCTOR DEVICE AND METHOD OF FORMING SAME FOR TEMPERATURE COMPENSATING ACTIVE RESISTANCE - In an embodiment a circuit provides an active resistance that is adjusted with temperature, the active resistance has a magnitude and temperature coefficient that is selected by the values of external resistors. The active resistance is controlled by an active resistance controller that uses a temperature dependent source and a temperature stable source to control adjustment of a first adjustable resistance to maintain correspondence between a temperature dependent parameter and a temperature stable parameter, and adjusts a second adjustable resistance that is part of the active resistance in correspondence with adjustment of the first adjustable resistance. | 05-30-2013 |
20140203720 | METHOD OF FORMING A CURRENT CONTROLLER FOR AN LED AND STRUCTURE THEREFOR - In one embodiment, an LED current controller is formed to determine which of a plurality of LED branches has the largest voltage drop and to select the current through that branch to use in controlling the value of current that flows through other LED branches. | 07-24-2014 |
Patent application number | Description | Published |
20100148089 | ION IMPLANTATION ION SOURCE, SYSTEM AND METHOD - An ion source is disclosed incorporating various aspects of the invention including i) a vaporizer, ii) a vaporizer valve, iii) a gas feed, iv) an ionization chamber, v) an electron gun, vi) a cooled mounting frame, and vii) an ion exit aperture. The ion source includes means for introducing gaseous feed material into the ionization chamber, means for vaporizing solid feed materials and introducing their vapors into the ionization chamber, means for ionizing the introduced gaseous feed materials within the ionization chamber, and means for extracting the ions thus produced from an ion exit aperture adjacent to the ionization region. In addition, means for accelerating and focusing the exiting ions are provided. The vaporizer, vaporizer valve, gas feed, ionization chamber, electron gun, cooled mounting frame, and ion exit aperture are all integrated into a single assembly in preferred embodiments of the novel ion source. | 06-17-2010 |
20130118609 | Gas flow device - The invention described herein pertains to an improved method of controlling the flow of gases into a process chamber. The method incorporates a gas source, one or more pressure reduction stages, a throttle valve, a pressure gauge, and a control system. When connected to a process chamber held at sub-atmospheric pressure, the invention provides a steady flow of gas such that the stability of said flow is superior to many commercially available metering devices, such as thermally-based mass flow controllers. | 05-16-2013 |