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US20090309653 |
CHOPPER STABILIZED AMPLIFIER
A chopper stabilized amplifier has differential inputs, an output, and a low frequency path and a high frequency path from the differential inputs to the output. Chopping occurs, at a chopping...
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US20090302923 |
TERMINATED INPUT BUFFER WITH OFFSET CANCELLATION CIRCUIT
A system and method for compensation of offset voltage in a digital differential input buffer driven by a terminated transmission line. Offset compensation currents are injected at the output of...
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US20090289703 |
OFFSET CANCELLATION CIRCUIT AND DISPLAY DEVICE
In an offset cancellation circuit according to the present invention, a first capacitance is connected to a gate of a first transistor of a first active load, and a second capacitance is connected...
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US20090289702 |
CURRENT GENERATOR
A current generator, including a chopper stabilization operational amplifier, a transistor, and an impedance unit is provided. The chopper stabilization operational amplifier includes a first input...
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US20090278597 |
Slew rate and settling time improvement circuitry and method for 3-stage amplifier
An operational amplifier ( 1 B) amplifies an input signal (Vin) to produce an output signal (Vout), and includes a 3-stage amplifier ( 1 C) including a first amplifier stage ( 2 ) receiving the...
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US20090273395 |
PREAMPLIFIER AND METHOD FOR CALIBRATING OFFSET VOLTAGES THEREIN
A preamplifier includes cascade-connected amplifying circuits, and at least one of the cascade-connected amplifying circuits includes a differential switch pair circuit, a comparator and current...
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US20090267687 |
CHOPPER-STABILIZED AMPLIFIER AND MAGNETIC FIELD SENSOR
A chopper-stabilized amplifier has switching networks arranged to support a high frequency clocking signal and to provide a high common mode rejection and a high rejection of an offset component of...
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US20090231029 |
COMBINATION OFFSET VOLTAGE AND BIAS CURRENT AUTO-ZERO CIRCUIT
A circuit with an input acquisition loop and an output acquisition loop is used to compensate for the input offset voltage and bias current errors of an operational amplifier.
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US20090212856 |
ANALOG AMPLIFIER HAVING DC OFFSET CANCELLATION CIRCUIT AND METHOD OF OFFSET CANCELLATION FOR ANALOG AMPLIFIERS
An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources....
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US20090195315 |
SAMPLE-AND-HOLD AMPLIFIERS
A sample-and-hold amplifier is provided. The sample-and-hold amplifier comprises a sample-and-hold circuit and a buffer circuit. The sample-and-hold circuit receives an input signal and transmits...
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US20090195306 |
SWITCHED-CAPACITOR CIRCUIT HAVING SWITCH-LESS FEEDBACK PATH
A switched-capacitor circuit includes a plurality of cascaded differential-input, single-ended-output amplifiers. A negative feedback path, from an output terminal of a last of the cascaded...
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US20090195305 |
Analog Switch Controller
Methods and systems for implementing an analog switch controller to improve linearity of analog switches are described.
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US20090167430 |
Switched-Capacitor Amplifier Arrangement and Method
A switched-capacitor amplifier arrangement and a method to amplify a signal are presented. A forward path has at least one switched capacitor ( 10 ) controlled by a clock signal, thus providing an...
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US20090153241 |
Simultaneous filtering and compensation circuitry and method in chopping amplifier
A chopper-stabilized amplifier ( 1 B) having a first output ( 25 ) includes an input chopper ( 9 ) for chopping an input signal and applying it to the input of a first amplifier ( 2 ) and an output...
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US20090140802 |
SEMICONDUCTOR INTEGRATED CIRCUIT
The present invention is directed to reduce offset error voltage in a signal source impedance of analog input signal voltage supplied to an input terminal due to input offset voltage of an...
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US20090128232 |
SWITCHED-CAPACITOR AMPLIFIER WITH IMPROVED RESET PHASE
A switch-capacitor (“SC”) amplifier includes a two-stage operational amplifier (“OP-AMP”), an input SC network, and a feedback SC network. The two-stage OP-AMP includes a first OP-AMP stage...
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US20090115507 |
METHOD OF AND APPARATUS FOR REDUCING SETTLING TIME OF A SWITCHED CAPACITOR AMPLIFIER
A method and apparatus for reducing settling time of a switched capacitor amplifier. The method includes disconnecting first and second capacitors from an amplifier. When the first and second...
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US20090108929 |
Apparatuses and methods for providing offset compensation for operational amplifier
Apparatuses and methods for providing offset compensation include a primary amplifier which includes a first output, a second output, a first load input, and a second load input, a first feedback...
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US20090086072 |
DUAL CDS/PxGA CIRCUIT
Provided is a dual sampling/pixel gain amplifier (CDS/PxGA) circuit with a shared amplifier, and more particularly, to a dual CDS/PxGA circuit for adjusting a gain of an amplifier based on...
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US20090039956 |
AMPLIFIER CIRCUITS, IMAGER, SYSTEM AND METHOD OF OPERATION
Systems, imagers, amplifiers and methods for use in operating a multi-channel amplifier. The multi-channel amplifier operates in a plurality of channels. A respective plurality of non-overlapping...
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US20090027116 |
METHOD AND INTEGRATED CIRCUIT INCLUDING AN AMPLIFIER CALIBRATION CIRCUIT
An integrated circuit including a circuit for calibration and offset compensation of an amplifier method is disclosed. In one embodiment, the method includes providing a reference input signal to...
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US20090009239 |
Low glitch offset correction circuit for auto-zero sensor amplifiers and method
An instrumentation amplifier includes first ( 11 A) and second ( 12 A) input amplifiers having outputs ( 15 A,B) coupled to an output amplifier ( 13 ). A first auto-zero stage ( 20 ) in the first...
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US20090009240 |
Amplifier Circuit
An amplifier circuit block and a compensation circuit block are provided. The amplifier circuit block includes an analog adder for subtracting an output signal of the compensation circuit block...
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US20080297243 |
Linear programmable switch-capacitance gain amplifier
A linear programmable switch-capacitance gain amplifier (PGA) is described. The PGA divides the dB-gain curve into several parts by the concept of piece-wise linearity, and then simultaneously...
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US20080252370 |
Digital Audio Amplifier and Digital Audio Amplifying Method Therefor
A digital audio signal amplifier and a digital audio signal amplifying method therefor are provided. More particularly, a digital audio signal amplifier in which both safety and power efficiency...
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US20080238539 |
ARRANGEMENT FOR CANCELING OFFSET OF AN OPERATIONAL AMPLIFIER
Operational amplifier circuitry drives a device which may be run with a combination of output signals fewer in number than the output signals delivered from plural output circuits. Each output...
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US20080238547 |
OFFSET CANCELING CIRCUIT AND OFFSET CANCELING METHOD
An offset canceling circuit includes a differential amplifier circuit configured to output a first output signal in response to a differential input signal; a latch circuit configured to hold a...
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US20080224768 |
Operational Amplifier Capable of Compensating Offset Voltage
An operational amplifier capable of compensating offset voltage includes an input stage circuit having a positive input end, a negative input end, a first current output end, and a second current...
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US20080211574 |
CHOPPER-STABILIZED INSTRUMENTATION AMPLIFIER
This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The...
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US20080197920 |
Arrangement For Carrying Out Current-To-Voltage Conversion
An arrangement for carrying out current-to-voltage conversion, preferably for an infrared receiver, in which the static offset, which has an interfering effect with regard to sensitivity or...
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US20080197834 |
SIGNAL DETECTING CIRCUIT
The signal detecting circuit has a first amplifier which amplifies the supplied signals and outputs the amplified signals from first and second output terminals; a switch unit which supplies the...
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US20080197921 |
System and method for minimizing DC offset in outputs of audio power amplifiers
An amplifier system receives an input signal and generating therefrom an amplified output signal. The amplifier system is recited as comprising an input stage and an amplifier stage. The input...
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US20080191800 |
Dual-chopper amplifier and its usage as readout circuit for capacitive sensors
Low-noise, high-dynamic-range readout circuits with reduced power dissipation for capacitive sensors having small sensing capacitance and low transducer sensitivity are provided by combining a...
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US20080136511 |
METHOD AND SYSTEM FOR FAST CALIBRATION TO CANCEL PHASE FEEDTHROUGH
Methods and systems for fast calibration to cancel phase feedthrough are disclosed and may comprise individually activating each of n binary-weighted cells utilizing a control signal in a power...
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US20080111618 |
DC offset cancellation circuit
A DC offset cancellation block is provided for canceling a DC offset in a signal path. The signal path may include an input and an output. The DC offset cancellation block may include an active...
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US20080094135 |
DC OFFSET MITIGATION IN A SINGLE-SUPPLY AMPLIFIER
An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge...
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US20080088368 |
Offset voltage correction for high gain amplifier
A method and an apparatus are described for an offset correction in a high gain amplifier. An embodiment of an amplifier circuit includes an amplifier to convert a current signal into a voltage...
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US20080054999 |
Input offset voltage corrector
An input offset voltage corrector used in an operational amplifier includes a switch unit, a register unit, an offset voltage correction unit and a micro control unit. The micro control unit sets...
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US20080048773 |
METHOD AND APPARATUS FOR DC OFFSET CANCELLATION IN AMPLIFIERS
A system, circuit, and method of canceling DC offset errors in cascaded amplifiers comprises arranging a plurality of any of analog voltage and analog current amplifier stages in any of cascaded...
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US20080030266 |
LIMITING AMPLIFIERS
A limiting amplifier with an input stage with dc offset cancellation, identical gain stages, an output buffer and a feedback filter. The input stage receives a differential input signal and outputs...
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US20080018393 |
Offset voltage correction circuit and class D amplifier
An offset voltage correction circuit for a differential amplifier comprising NMOS transistors serving as a pair of differential transistors, and PMOS transistors serving as a pair of load...
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US20080012634 |
Programmable gain amplifier
A programmable gain amplifier includes an OP amplifier, N decayed capacitor(s), (N+1) adjusting capacitor modules, switches, a switch control module, and a feedback switch. First terminals of...
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