| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 327124000 | By periodic switching (e.g., chopper, etc.) | 8 |
| 20090027092 | METHOD AND APPARATUS FOR PRODUCING CLEAN, UNDISTORTED VARIABLE VOLTAGE 50 - 60 HZ SINE WAVE - The invention is directed to a solid-state replacement for a variable transformer. The circuit arrangement presented is not placed in series with the load. It can change output voltage quickly, and is able to deliver more current to the load than is drawn from the source while stepping down because the circuit is not placed in series with a load. The output voltage from the driver circuit is a low-frequency sine wave that is “chopped” by a high frequency carrier, yet the end result after the transformer or LC filter is a very clean sine wave. The circuit arrangement is lightweight and inexpensive to fabricate. | 01-29-2009 |
| 20090278575 | CHARGE RECYCLING AMPLIFIER FOR A HIGH DYNAMIC RANGE CMOS IMAGER - A high dynamic range amplifier circuit for amplifying pixel signals of an imager device is disclosed. The amplifier circuit uses a read-out scheme based on a charge recycling approach, where a pixel signal is first amplified with a low gain during a first amplification phase T | 11-12-2009 |
| 20110199132 | SYSTEM PROVIDING A SWITCHED OUTPUT SIGNAL AND A HIGH RESOLUTION OUTPUT SIGNAL - A system including a sensing system, a first chopped circuit, a second chopped circuit, and a clock generator. The sensing system is configured to provide sensed input signals. The first chopped circuit is configured to provide a switched output signal that switches in response to values of the sensed input signals crossing a limit. The second chopped circuit is configured to provide a high resolution output signal that corresponds to the sensed input signals and has a higher resolution than the switched output signal. The clock generator is configured to provide clock signals that synchronize chopping of the first chopped circuit and the second chopped circuit. | 08-18-2011 |
| 20130009678 | SYSTEM PROVIDING A SWITCHED OUTPUT SIGNAL AND A HIGH RESOLUTION OUTPUT SIGNAL - A system includes a sensing system, a first chopped circuit, a second chopped circuit, and a multiplexer. The sensing system is configured to provide input signals. The first chopped circuit is configured to switch in response to the input signals crossing a first limit and to provide a first output signal that is valid during some chopping phases. The second chopped circuit is configured to switch in response to the input signals crossing a second limit and to provide a second output signal that is valid during other chopping phases. The multiplexer is configured to switch between the first output signal and the second output signal to provide a valid output signal during all chopping phases. | 01-10-2013 |
| 20130049823 | SEMICONDUCTOR DEVICE - A semiconductor device includes a variable resistor that sets a resistance value as a first resistance value in an emphasis mode, and as a second resistance value smaller than the first resistance value in a de-emphasis mode, a first driver that sets an output impedance as a third resistance value in the emphasis mode, and as a fourth resistance value larger than the third resistance value in the de-emphasis mode, a second driver that sets the output impedance as a fifth resistance value in the emphasis mode, and as a sixth resistance value larger than the fifth resistance value in the de-emphasis mode, and a controller that controls conductive states of the first and second drivers according to an input signal, and switches the output impedances of the first and second drivers and the resistance value of the variable resistor between the emphasis mode and the de-emphasis mode. | 02-28-2013 |
| 20130200930 | INTEGRATED POWER SUPPLY FOR FIBER OPTIC COMMUNICATION DEVICES AND SUBSYSTEMS - An example embodiment includes a fiber optic integrated circuit (IC). The fiber optic IC includes an integrated power supply. The integrated power supply includes a filter, an active switch, and a pulse width modulator (“PWM”). The filter is configured to convert a signal to an output signal of the integrated power supply. The active switch is configured to control introduction of the signal to the filter. The PWM is configured to generate a PWM output signal that triggers the active switch. | 08-08-2013 |
| 20140292382 | IMPULSE VOLTAGE GENERATION DEVICE - A signal generator generates a combined signal that is generated only in the period where supply of a pulse signal is effected, a pulse signal whose frequency is of a higher impulse repetition frequency than the frequency of the period setting signal and whose amplitude represents a voltage value that is lower than the high voltage HVDC value. A semiconductor switch accumulates electric charge on a capacitative element by means of the high voltage HVDC from the high voltage generator when the voltage value of the combined signal is lower than the set gate voltage value and generates an impulse voltage whose peak value is the value of the high voltage HVDC, by means of the electric charge that is discharged from the capacitative element when the voltage value of the combined signal exceeds the set gate voltage value. | 10-02-2014 |
| 20140347104 | CIRCUIT FOR GENERATING A VOLTAGE WAVEFORM - A circuit for generating a voltage waveform at an output node. The circuit includes a voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance. The circuit may be included in an apparatus for use in processing charged particles, e.g. for use in performing mass spectrometry or ion mobility spectrometry. | 11-27-2014 |
