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| Number | Title | Issue Date |
| 7579885 | 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 amplificat... | 08/25/2009 |
| 7471124 | Chopper circuit that chops edge of control signal A chopper circuit has a delay circuit that delays a received control signal and a difference detection circuit that detects a difference between a control signal delayed by the delay circuit and the received control signal. A first threshold based on which the delay... | 12/30/2008 |
| 7439780 | Chopper type comparator A comparator includes: a CMOS inverter constituted by a combination of a first p-channel MOS transistor and a first n-channel MOS transistor; a second p-channel MOS transistor connected in parallel to the first p-channel MOS transistor in an analog input period, and... | 10/21/2008 |
| 7408390 | DC to DC converter and voltage detecting circuit and current detecting circuit thereof A DC to DC converter includes a current detecting circuit having a level shift circuit, which includes a resistor and a current source. A first low-pass filter is led out from a node via a signal line and includes a resistor and a capacitor. A first switch is provid... | 08/05/2008 |
| 7385442 | System and method for constant bandwidth DC offset correction in an amplifier According to one embodiment, a system for constant bandwidth DC offset correction in an amplifier includes a number of amplifier stages having an input and an output coupled together in series. The system for constant bandwidth DC offset correction further includes ... | 06/10/2008 |
| 7372391 | Pipeline ADC with memory effects achieving one cycle absolute over-range recovery A data conversion stage circuit (104) for an opamp-shared pipeline analog-to-digital converter (ADC) (100) includes an over-range detection and recovery circuit including first and second switches (S3, S4) connected between respective inp... | 05/13/2008 |
| 7355300 | Solid state turbine engine ignition exciter having elevated temperature operational capability A turbine engine ignition exciter circuit applies energy stored in the exciter tank capacitor to the load (igniter plug) through a thyristor type semiconductor switching device that minimizes leakage current at elevated operating temperatures. The semiconductor swit... | 04/08/2008 |
| 7339423 | Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers The present invention comprises switched capacitor amplifiers including positive feedback on semiconductor devices, wafers, and systems incorporating same and methods for amplifying signals using positive feedback, while maintaining a stable gain and producing an im... | 03/04/2008 |
| 7336123 | Chopper amplifier circuit apparatus operable at low voltage utilizing switched operational amplifier In a chopper amplifier circuit operable at a low voltage utilizing a switched operational amplifier, a chopper modulator chopper-modulates an input signal according to a predetermined control signal, and outputs a chopper-modulated signal. An amplifier circuit const... | 02/26/2008 |
| 7330390 | Noise resistant small signal sensing circuit for a memory device Apparatus and method for data sensing circuitry that uses averaging to sense small differences in signal levels representing data states. The apparatus periodically switches the coupling of input terminals and output terminals of an integrator circuit from a first c... | 02/12/2008 |
| 7323828 | LED current bias control using a step down regulator A step down switching regulator circuit that is particularly well-suited to drive high power LEDs includes a crossover conduction mode (XCM) control circuit that maintains operation at the crossover point between continuous conduction mode (CCM) and discontinuous co... | 01/29/2008 |
| 7321261 | Full swing amplifying circuit and applications thereof An amplifying circuit includes an input chopping circuit, an amplifier, and an output chopping circuit. The input chopping circuit is operably coupled to chop an input signal at a chopping rate to produce a chopped input signal. The amplifier has a first input trans... | 01/22/2008 |
| 7315272 | Inverter-based flash analog-to-digital converter using floating resistor ladder An analog-to-digital converter device for converting an analog signal into a digital signal includes a comparator array including a plurality of comparators, each of the comparators including a first inverter and a second inverter connected in series with the first ... | 01/01/2008 |
| 7295042 | Buffer A switched capacitor buffer operating by the push-pull method is taught. The buffer may include a pull-up device and a pull-down device. A switched capacitor circuit may be used to control the pull-up device and the pull-down device to achieve accurate push-pull ope... | 11/13/2007 |
| 7295061 | Fully integrated programmable gain chopper amplifier with self DC offset suppression Chopper amplifiers and methods of amplification are provided. A circuit includes an adjustable modulation resistance network, an amplifier, and an adjustable feedback resistance network. The adjustable modulation resistance network receives and modulates an input si... | 11/13/2007 |
| 7265611 | Self zeroing for critical, continuous-time applications Apparatus (1) for continuous-time application, comprising an operational amplifier (2) and a self-zeroing control unit (3) for reducing an offset of the operational amplifier (2). The self-zeroing control unit (3) provides for a se... | 09/04/2007 |
| 7250813 | Split amplifier architecture for cross talk cancellation An amplifier circuit includes a first amplifier and a second amplifier and sets of switching devices controlled by a bistate control signal. The bistate control signal is in the first state to cause the first and second sets of switching devices to configure the fir... | 07/31/2007 |
| 7245090 | Switching LED driver with temperature compensation to program LED current The present invention provides a LED driver for control the brightness of the LED. An energy-transferred element and a switch are connected in series with the LED for controlling the current of the LED. A diode is coupled to the energy-transferred element for freewh... | 07/17/2007 |
| 7245089 | Switching LED driver The present invention provides a LED driver for controlling the brightness of the LED. An inductor and a switch are connected in series with the LED for controlling the current of the LED. A diode is coupled in parallel to the inductor for freewheeling the energy of... | 07/17/2007 |
| 7224213 | Switched capacitor ripple-smoothing filter A switched-capacitor ripple-smoothing filter includes a first pair of capacitors. The filter is configured such that either capacitor in the first pair may be reset and have a terminal coupled to a first input port and such that the remaining capacitor in the first ... | 05/29/2007 |
| 7224220 | Low distortion variable gain and rooting amplifier with solid state relay An amplifier which comprises an operational amplifier, a semiconductor switch that selectively connects at least one circuit to an input terminal of the operational amplifier, and a device for virtual shorting of both terminals of the semiconductor switch in an isol... | 05/29/2007 |
| 7224216 | Segmented chopping amplifier A chopping amplifier and method for chopping an input signal are disclosed. The chopping amplifier and method utilize at least two chopping amplifier stages. A chopping operation of an input signal is segmented across two or more chopping amplifier stages, and the t... | 05/29/2007 |
| 7215084 | Power control arrangement, as for a flashlight In a battery-operated apparatus comprising a load, a battery and a switch in circuit for selectively energizing the load: a comparator compares a potential produced by the battery and a reference potential for de-energizing the load when the battery potential is bel... | 05/08/2007 |
| 7209000 | Frequency stabilization of chopper-stabilized amplifiers Frequency stabilization of chopper-stabilized amplifiers using multipath hybrid double-nested Miller compensation. The compensation may provide a desired 6 dB/oct roll off for both instrumentation amplifiers and operational amplifiers. Various embodiments are disclo... | 04/24/2007 |
| 7183957 | Signal processing system with analog-to-digital converter using delta-sigma modulation having an internal stabilizer loop A signal processing system includes an analog-to-digital delta sigma modulator with a duty cycle modulator and a finite impulse response (FIR) filter in a main loop feedback path of the delta sigma modulator. The duty cycle modulator and FIR filter can provide high ... | 02/27/2007 |
| 7157946 | Chopper comparator circuit The conventional chopper comparator circuit has had high power consumption because the gain thereof used to be set high, so that there has been the need for cutting down on power consumption. In view of the problem described, there is provided a chopper comparator c... | 01/02/2007 |
| 7132868 | Semiconductor device As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance. A semiconductor device having a semiconductor switching element and a drive controlling means (1) for gener... | 11/07/2006 |
| 7132883 | Chopper chopper-stabilized instrumentation and operational amplifiers Chopper chopper-stabilized instrumentation and operational amplifiers having ultra low offset. The instrumentation amplifiers use current-feedback, and include, in addition to a main chopper amplifier chain, a chopper stabilized loop for correcting for the offset of... | 11/07/2006 |
| 7123301 | Pixel gain amplifier A correlated double sampling pixel gain amplifier includes an operational amplifier, an input sampling capacitor, and a feedback capacitor. The input capacitor samples the input signal during a first time phase and the feedback capacitor receives the signal charge f... | 10/17/2006 |
| 7116161 | Differential amplifier circuit and drive circuit of liquid crystal display unit using the same Even when an input is small in a current supply capacity, a differential amplifier circuit capable of outputting a high accurate voltage with an offset corrected can be obtained. In the differential amplifier having first and second input terminals and an output ter... | 10/03/2006 |
| 7095667 | Noise resistant small signal sensing circuit for a memory device Apparatus and method for data sensing circuitry that uses averaging to sense small differences in signal levels representing data states. The apparatus periodically switches the coupling of input terminals and output terminals of an integrator circuit from a first c... | 08/22/2006 |
| 7095275 | BTL amplifier capable of providing stability of offset compensation A BTL amplifier has a resistance element connected to an output reference voltage input terminal of an inverting amplifier. For offset compensation of the BTL amplifier, a variable current source controller controls an input switching circuit to cause application of... | 08/22/2006 |
| 7092538 | Switched microphone buffer A method and apparatus for substantially reducing and virtually eliminating direct current flow through the input transistor(s) of an input buffer circuit for an electret microphone is disclosed. An input transistor is provided and operably connected to an input and... | 08/15/2006 |
| 7084528 | High-voltage pulse generating circuit A high-voltage pulse generating circuit has an inductor, a first semiconductor switch, and a second semiconductor switch which are connected in series between opposite terminals of a DC power supply unit, and a diode having a cathode terminal connected to a terminal... | 08/01/2006 |
| 7034737 | Switched capacitor circuits A switched capacitor circuit includes an amplifier, a first switched capacitor network, and a second switched capacitor network. Either the first or second switched capacitor network is switched in a sampling configuration or a gain configuration according to connec... | 04/25/2006 |
| 7019566 | Bi-polar PNP chopper A switch comprises an input with two input lines and an input stage comprising four current controlled PNP-transistors and four resistors, and an output comprising two output lines, and arranged to receive a constant voltage on the input and on the output produce a ... | 03/28/2006 |
| 6975136 | Isolated channel in an integrated circuit A semiconductor package contains at least one electrically isolated channel. The isolated channel is minimally susceptible to crosstalk from other channels in the package. Specifically, the level of crosstalk that may impinge on the isolated channel is below an acce... | 12/13/2005 |
| 6972530 | Apparatus and method for transparent dynamic range scaling for open loop LED drivers The dynamic range of a charging current in an open-loop LED driver circuit is scaled to provide a charging current within tolerance for the open-loop LED driver. The scaling of the dynamic range of the charging current is performed transparently to the user, such th... | 12/06/2005 |
| 6967797 | Write driver circuit for driving a magnetic head A write driver circuit for driving a magnetic head applicable to a variety of magnetic heads or magnetic storage media is disclosed. The circuit includes a write current generating section for generating plural types of write current for magnetizing a predetermined ... | 11/22/2005 |
| 6967509 | 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 amplificat... | 11/22/2005 |
