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6859095 |
Non-switched capacitor offset voltage compensation in operational amplifiers
A method for reducing offset voltage in an operational amplifier without the need for switched-capacitors, includes introducing a tapped resistor chain between the common connected terminals of the...
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6856198 |
Amplifier and method for voltage-to-current conversion
An amplifier includes a differential unit including an input port to receive a voltage input signal, a current mirror unit including an output port, and a voltage-to-current conversion unit to...
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6853249 |
Gm replica cell utilizing an error amplifier connected to a current mirror
A method and apparatus for calibrating a Gm cell using a Gm replica cell. A digital to analog converter receives a Gm setting code and generates a reference current. The Gm replica cell adjusts the...
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6850109 |
Linear voltage subtractor/adder circuit and MOS differential amplifier circuit therefor
A voltage subtractor/adder circuit has a differential pair having first and second MOS transistors. Gate electrodes of the first and second MOS transistors form input terminals for receiving an...
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6844781 |
Dual differential-input amplifier having wide input range
A dual differential-input operational amplifier that includes six PMOSFETs having their source terminals coupled to a high voltage. A seventh and eighth PMOSFET have their source terminals coupled...
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6838943 |
Input follower system and method
An equalizer circuit for equalizing first and second differential input signals comprises a differential pair, a reactive load, and first and second input followers. The differential pair defines...
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6831513 |
Differential amplifier
A differential amplifier includes a first diode having a first terminal and a second terminal wherein the first terminal is coupled to a voltage node and the second terminal is coupled to a first...
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6828855 |
Class AB operational amplifier with split folded-cascode structure and method
Bias current in output transistors of a class AB output stage is controlled by providing equal amplification to both an output of an input stage ( 2 ) of an amplifier and an output ( 17,18 ) of a...
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6825722 |
Mixer and differential amplifier having bandpass frequency selectivity
A mixer and a differential amplifier are formed using simple circuit configurations such that the cutoff frequencies thereof can be easily changed. Each of the mixer and the differential amplifier...
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6825721 |
Amplifier gain boost circuitry and method
A gain boost circuit is provided in a differential amplifier including differentially connected first and second input transistors the drains of which are coupled to sources of first and second...
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6825696 |
Dual-stage comparator unit
A comparator unit includes a first amplifier stage and a second amplifier stage. The first amplifier stage includes a differential amplifier having a pair of input nodes for receiving a...
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6822513 |
Symmetric and complementary differential amplifier
A complementary differential amplifier includes two differential amplifiers. Each differential amplifier includes two input FETs (or bipolar transistors) having gate terminals coupled to the input...
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6819178 |
Selectable single mode or differential mode operation in a single amplifier
A dual mode amplifier having single ended and differential ended modes of operation using only one set of output pads or terminals. The dual mode amplifier has two differential amplifiers,...
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6819143 |
Input buffer circuit having equal duty cycle
An input buffer circuit includes a first differential circuit, a second differential circuit, a pull-up circuit, and a pull-down circuit. An input voltage and a reference voltage are provided to...
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6812781 |
Differential amplifier, semiconductor device, power supply circuit and electronic equipment using the same
A first differential amplifier circuit includes a first P-type transistor and a second P-type transistor which constitute a current mirror circuit, and operates based on an input voltage V IN . A...
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6809582 |
Semiconductor device including a differential transistor pair
Two groups of diodes are connected to internal lines transmitting complementary signals, respectively, and positions of the centers of gravity of the groups of diodes are made coincident with each...
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6803819 |
Variable gain amplifier having improved gain slope characteristic and linearity
The present invention relates to improvement of gain slope characteristic and linearity of a variable gain amplifier. According to the present invention, a variable gain amplifier is proved, which...
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6803823 |
Circuit, apparatus and method for an adaptive voltage swing limiter
A circuit, apparatus and method for providing a balanced differential signal from incoming serial data having high or low voltage swings are provided in embodiments of the present invention. In an...
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6801080 |
CMOS differential input buffer with source-follower input clamps
A differential input buffer shows reduced sensitivity to input conditions such as input-trace loading and upstream driver characteristics. Varying input conditions can be measured as differences in...
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6798292 |
Highly linear low voltage rail-to-rail input/output operational amplifier
An operational amplifier circuit includes: a first differential pair 20 of a first conductivity type having a first current branch and a second current branch; a second differential pair 22 of...
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6798293 |
Digitally controlled variable offset amplifier
First and second differential transistor pairs, where each may be intentionally unbalanced or balanced, are provided. First and second digitally variable current generators are coupled to control...
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6798265 |
Low jitter external clocking
A low jitter external clocking system and method are disclosed. According to one embodiment of the present invention, a differential clock signal is received on a first clock signal line and a...
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6791412 |
Differential amplifier output stage
An output stage for a differential amplifier is presented. If the differential amplifier is a matched current differential amplifier where the non-inverted and inverted differentials have the same...
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6791415 |
Integrated circuit arrangement with a transconductance amplifier
The invention pertains to an integrated circuit arrangement, in particular, in accordance with the CMOS technology, with at least one transconductance amplifier ( 1 ) in order to generate a current...
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6791309 |
Limiter circuit
A limiter circuit according to this invention includes a first differential amplifier, a first transistor to a base of which the output of the first differential amplifier is applied, a first...
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6791413 |
Variable gain amplifier with a gain exhibiting a linear in dB characteristic relative to a control voltage
A variable gain amplifier is configured of an amplification circuit and a control circuit controlling a gain of the amplification circuit. The amplification circuit has first and second MOS...
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6788143 |
Cascode stage for an operational amplifier
A cascode stage is arranged to improve performance of an operational amplifier. The cascode stage includes transistors that are arranged to operate as a current mirror. Each side of the current...
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6788141 |
Power amplifier circuitry and method
A method and apparatus is provided for use in power amplifiers for reducing the peak voltage that transistors are subjected to. A power amplifier is provided with first and second switching devices...
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6788136 |
Methods and apparatus for amplification in high temperature environments
In one aspect, the present invention provides a method for amplifying a signal including generating an input signal and amplifying the input signal utilizing a chopper-stabilized, silicon carbide...
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6784737 |
Voltage multiplier circuit
A voltage multiplier circuit includes a voltage-to-current converter, a current multiplier, and load devices. The voltage-to-current converter receives a differential input voltage, and produces a...
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6784735 |
High switching speed differential amplifier
A high switching speed differential amplifier comprises a differential pair, a first and a second active loads, and a current source, in which the differential pair is composed of a pair of MOS...
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6784749 |
Limiting amplifier with active inductor
According to some embodiments, a circuit includes a limiting amplifier, the limiting amplifier including an output node. The circuit also includes an active inductor coupled to the output node, and...
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6784734 |
All digital transistor high gain operational amplifier using positive feedback technique
A new all digital transistor CMOS very high DC-gain amplifier ( 30 ) that uses an internal positive-feedback technique. This amplifier ( 30 ) does not require perfect matching of transistors (M 2...
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6784500 |
High voltage integrated circuit amplifier
A circuit including at least one low voltage input, at least one high voltage output, and a field transistor having a source, a drain and a control region. The circuit may comprise a high-voltage...
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6781460 |
Low power low voltage differential signal receiver with improved skew and jitter performance
A folder common cascode circuit with symmetric parallel signal paths from the differential inputs to the differential outputs provides a low skew, low jitter, low power differential amplifier. The...
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6781463 |
Low voltage amplifier
An operational amplifier is configured for low voltage operation and better compliance. An exemplary operational amplifier comprises a folded-cascode amplifier with a class-AB biased output stage...
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6781449 |
Electronic output stage
An electronic output module, especially an electronic output module for CMOS-LVDS levels (LVDS-low voltage differential signalling), is suitable for analogue and digital high-frequency circuits....
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6781462 |
Power amplifier
A power amplifier that utilizes a minimum amount of power, and, simultaneously, inhibits the generation of distortion is described. The power amplifier includes a differential input terminal, an...
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6778014 |
CMOS differential amplifier
A Complementary CMOS differential amplifier has automatic operating point adjustment (self-biasing) and the properties of a rail-to-rail amplifier. The CMOS differential amplifier uses folded...
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6778010 |
Amplifier slew-rate enhancement systems for use with switched-capacitor structures
High-speed differential amplifiers are provided for use with switched-capacitor structures. These amplifiers reduce current demand during small-signal operation and generate high slew currents...
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6774721 |
High speed logic circuits
Quake Transistor Logic (QTL) circuits of the embodiments of the invention are low power, high-speed circuits that can be manufactured by the same process as the lower-speed complex circuits, and...
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6774720 |
Electric field intensity detecting circuit and limiter amplifier
A second differential amplifier ( 12 ) is additionally disposed in parallel with at least a part of first differential amplifiers ( 11 ) in respect to a differential amplifying circuit comprising a...
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6759905 |
Analog input circuit with common mode compatibility to both supply nodes
An analog input circuit may include a pair of differential transconductance input stages having input nodes connected in parallel and which are fed the analog input signal. One of the differential...
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6760381 |
High-voltage differential driver using stacked low-breakdown transistors and nested-miller compensation
An amplifier drives a Digital-Subscriber Line (DSL) using a 12-volt power supply. Ordinary low-voltage transistors for 5-volt systems are stacked together to reduce the average voltage across each...
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6759898 |
Dual input differential amplifier
Embodiments of a dual input differential amplifier are described. The dual input differential amplifier includes multiple input devices forming at least two sets of differential inputs for an...
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6756846 |
Increased output swing line drivers for operation at supply voltages that exceed the breakdown voltage of the integrated circuit technology
An improved line driver and method for increasing the available signal transmit power on a transmission line are disclosed. The improved line driver achieves an available transmit power increase...
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6753731 |
Operation amplifier circuit, drive circuit and method of controlling operation amplifier circuit
An operational amplifier circuit includes a differential section, an output section having drive transistors PT 15 and NT 15 , a voltage setting circuit which sets a programming voltage at a node...
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6754478 |
CMOS low noise amplifier
A CMOS low noise amplifier (LNA) is provided that is formed without inductors. The CMOS LNA can be used for a single-chip CMOS RF receiver. The CMOS LNA can include a plurality of amplification...
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6753730 |
Differential amplifier and filter circuit using the same
A differential amplifier is constructed in such a manner that a unit includes the sources of a first and a second MOS transistor and the drain of a third MOS transistor are connected to each other,...
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6750704 |
Offset compensated differential amplifier
A differential amplifier comprises a differential input stage including first and second input devices and has first and second input electrodes and first and second output terminals. A...
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