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7583127 High Q linear controlled variable capacitor using translinear amplifier  
A voltage controlled variable capacitor, formed of a larger number of fixed capacitor segments and a corresponding number of switching elements, uses translinear amplifiers to control each...
7391204 Sensor signal conditioning circuit  
A sensor signal conditioning circuit and sensor system incorporating the same. In one embodiment, the signal conditioning circuit includes a DC-coupled detector that converts a sensor signal into a...
7126408 Method and apparatus for receiving high-speed signals with low latency  
An apparatus and method for receiving high-speed signals having a wide common-mode range with low input-to-output latency. In one embodiment, the receiver includes an integrator to accumulate...
7042271 Resistor compensation apparatus  
A compensation apparatus maintains an effective resistance of one or more resistors in a circuit by associating an adjustable resistor circuit to each resistor. The compensation apparatus compares...
7015750 Method for lowering noise and providing offset correction in a transimpedance amplifier  
A system for receiving signals (e.g., optical signals) includes an input device, an amplification device, and a feedback device. The amplification device receives a signal from the input device and...
6965262 Method and apparatus for receiving high speed signals with low latency  
An apparatus and method for receiving high-speed signals having a wide common-mode range with low input-to-output latency. In one embodiment, the receiver includes an integrator to accumulate...
6882218 Transimpedance amplifier and offset correction mechanism and method for lowering noise  
A system for receiving signals (e.g., optical signals) includes an input device, an amplification device, and a feedback device. The amplification device receives a signal from the input device and...
6720817 All NPN class-AB log-domain integrator with supporting input and output circuitry for low-voltage and high-frequency continuous-time filtering  
Two variations of a continuous-time instantaneous companding filter are integrated in a 25 GHz bipolar process. Their −3 dB frequencies are tunable in the ranges of 1-30 MHz and 30-100 MHz. The...
6657476 AC-coupled sensor signal conditioning circuit  
A method and apparatus for minimizing errors in a sensor device due to signal amplitude variation are disclosed herein. A signal output from the sensor device is amplified and, thereafter,...
6650177 System and method for tuning an RC continuous-time filter  
Methods and systems for tuning an RC continuous-time filter are disclosed. In this regard a representative system for tuning an RC continuous-time filter includes a coarse-tuned resistive element...
6563364 Gain controller using switched capacitors  
A gain controller using switched capacitors is provided. The gain controller is operable in a sampling mode or an amplifying mode and controls the gain of an analog input signal. The gain...
6489812 Temperature-compensated small signal peak detector  
A system and method for temperature-compensated small signal peak detection. A small amplitude signal peak detector includes an exponential operator for generating a modulated signal through the...
6359495 Anti-saturation integrator and method  
A perfect integrator emulator includes a first multiplier multiplying an input with a first constant, K NEW , and generating a scaled input, a summer summing the scaled input with a previously...
6356135 Programmable electronic trim capacitor  
An electronically trimable capacitor ( 10 ) having a plurality of branch circuits ( 30 ) each including a capacitor ( 32 ) which may be selectively controlled by a switch ( 34 ) to contribute or...
6339349 Method and circuit for comparator-less generation of ramped voltage having controlled maximum amplitude  
A circuit for generating a ramped voltage having controlled maximum amplitude (e.g., for use in a switching controller), and a method for generating such a ramped voltage without use of a...
6313770 System for sampling an analog signal and method thereof  
In accordance with a specific embodiment of the present invention, a system is disclosed having an analog to digital converter and control module. The analog-to-digital converter includes an analog...
6313685 Offset cancelled integrator  
An offset integrator and method are provided to induce integrator leakage while simultaneously latching and canceling its own offset. The method includes combining a first and second input signals...
6294945 System and method for compensating the dielectric absorption of a capacitor using the dielectric absorption of another capacitor  
A system and method, wherein the dielectric absorption of a capacitor is cancelled by a compensating circuit. One embodiment uses a compensation circuit comprising a compensating capacitor with...
6285206 Comparator circuit  
There is provided a comparator circuit which does not output any erroneous comparison result even if the resistance value of a resistance component that exists in the input circuit for a voltage...
6239653 Biquadratic basic cell for programmable analog time-continuous filter  
The invention relates to an elementary biquadratic cell for programmable time-continuous analog filters. The biquadratic cell is coupled between a first voltage reference and a second voltage...
6194946 Method and circuit for compensating the non-linearity of capacitors  
Capacitor voltage coefficient errors are reduced in a lossy integrator by providing oppositely oriented first and second feedback capacitors in a switched capacitor feedback circuit coupled between...
6023191 Method and apparatus for detecting an input signal  
A level detector detects an input signal level. A rectifier (210) receives the input signal and provides a rectified signal. A prefilter (220) receives the rectified signal and attenuates high...
5841310 Current-to-voltage integrator for analog-to-digital converter, and method  
An integrating circuit includes an operational amplifier and an integrating capacitor which is decoupled from the output of the operational amplifier and precharged to a positive reference voltage...
5793243 Method of stabilizing an electronic signal integrator  
A signal integrator stabilization circuit comprises an operational amplifier functioning as a comparator. The circuit further comprises an attenuator in the amplifier's feedback, thereby generating...
5764095 Nonlinear integrator  
A non-linear integrator of a closed loop integration system selectively modifies the gain of the closed loop integration system in order to avoid system saturation while still experiencing high...
5763924 Circuits and methods for compensating non-linear capacitances to minimize harmonic distortion  
A simple, low-cost circuit and method for line zing parasitic capacitances of transistor junctions, independent of the process technology employed, are provided. In the preferred embodiment, the...
5757219 Apparatus for and method of autozeroing the input of a charge-to-voltage converter  
The invention is an autozero compensator for use in processing low level signals, the compensator comprising an input integrating operational amplifier providing at its output in one mode an error...
5748023 Integrator with output-compensating capability  
An integrator is disclosed that is capable of outputting the same integration result with respect to the same bit pattern even if there are fluctuations in the integrating period, semiconductor...
5699006 DC blocking apparatus and technique for sampled data filters  
A sampled data filter (400) provides on-chip blocking of DC signals. The addition of a very long time constant (VLTC) integrator (412) into the negative feedback path (414) of a first sampled data...
5638020 Switched capacitor differential circuits  
A switched capacitor differential circuit switches first and second differential input signals (Vinp1, Vinp2) to respective inputs (A, B) of an operational amplifier (12) via respective first and...
5617473 Sign bit integrator and method  
A sign bit integrator and method for generating a signal to correct an offset in a signal processing system that can distort the output from the system. A charge pulse is generated when the sign of...
5585756 Gated integrator with signal baseline subtraction  
An ultrafast, high precision gated integrator includes an opamp having differential inputs. A signal to be integrated is applied to one of the differential inputs through a first input network, and...
5557242 Method and apparatus for dielectric absorption compensation  
A dielectric absorption compensation circuit (300) provides an equivalent and opposite impedance to a parasitic impedance of an external capacitive load (414). The dielectric absorption...
5519328 Compensation for dielectric absorption effect  
Apparatus is provided for continuously compensating for the dielectric absorption effect in a measuring capacitor in a circuit which employs means for charging the capacitor to develop an output...
5498992 Unity gain positive feedback integrator with programmable charging currents and polarities  
An integrator includes a capacitor and a bootstrap circuit for detecting any leaking charge from the capacitor and replacing it. The integrator also includes a charge injection circuit for...
5479130 Auto-zero switched-capacitor integrator  
A switched-capacitor auto-zero integrator includes and integrator circuit and a correction circuit. The integrator circuit may be any circuit including an operational amplifier having an input line...
5467045 Integrator including an offset eliminating circuit and capable of operating with low voltage  
A complete type integrator is disclosed which is designed such that the time-constant thereof can be controlled; wide input and output dynamic ranges can be achieved; operation with low power...
5376834 Initialization circuit for automatically establishing an output to zero or desired reference potential  
A circuit for initializing the output voltage of an analog circuit includes a switch operative to connect an input of the analog circuit to a first reference potential during an initializing...
5319266 Differential boxcar integrator with auto-zero function  
A switched boxcar integrating circuit suitable for use with high speed data acquisition systems such as an Optical Domain Reflectometer. The boxcar integrator comprises a differential pre-amplifier...
5189321 Companding current-mode transconductor-C integrator  
In a current-mode transconductor-C integrator, the non-linearity of the voltage-to-current conversion of a transconductor is corrected by means of a differentiator which supplies a current (i d )...
5081423 Integrator and active filter including integrator with simple phase compensation  
In an integrator circuit having a wide linearity range, there are provided: a first emitter-coupled transistor pair having two bipolar transistors, emitter areas of the transistors being...
4760345 Charge amplifier circuit  
A charge amplifier circuit includes an operational amplifier with an integrating capacitor between its inverting input and its output, and a resetting device with a switch that is closed during the...
4651032 Compensating integrator without feedback  
A compensating integrator includes an integrator and a compensating capacitor. During a compensating period, the capacitor is charged with a voltage related to an error component of an input signal...
4636738 Parasitic compensated switched capacitor integrator  
A switched capacitor integrator for receiving a single input signal is compensated for parasitic capacitance errors with a minimum amount of circuitry. Although a single-ended amplifier is...
4602171 Inhalation transducer circuit with DC drift compensation  
An inhalation transducer circuit is provided for use with a transducer having a variable electrical output. Early amplifier stages provide very high gain, and are subsequently a.c. coupled to...
4578646 Integral-type small signal input circuit  
An integral-type small signal input circuit having a Miller integrator is adapted to perform cyclically an integrating operation, a resetting operation and an input offset current compensating...
4520276 Zero-delay ramp generator  
An error amplifier receives an on/off signal and supplies an error signal to an integrator. The latter provides a ramp output, which is fed back to the error amplifier whereby the error signal...
4393351 Offset compensation for switched capacitor integrators  
An integrator circuit utilizing an operational amplifier (19) and switched capacitor elements (11, 13 and 16) in place of resistors in such a manner as to provide compensation for voltage offsets...
4384257 Storage stabilized integrator  
An electronic integrator which is insensitive to drift because a storage and forcing circuit maintains the output voltage of the integrator at a constant level.
4377759 Offset compensating circuit  
An offset compensating circuit is disclosed. The offset compensating circuit is inserted in a negative feedback loop of a circuit to be compensated and includes an integration circuit. The...
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