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7622990 |
Amplifiers, methods of increasing current gain in amplifiers, and imaging devices
An amplifier includes a differential stage including a differential pair of transistors of a first conductivity type, the differential pair having gates, first and second inputs to the amplifier...
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7612615 |
Dual supply amplifier
A dual supply amplifier without using an inter-stage capacitor is disclosed. The dual supply amplifier has an input stage coupled to a lower supply voltage V DD1 for generating a voltage signal V...
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7605656 |
Operational amplifier with rail-to-rail common-mode input and output range
An operational amplifier with a rail-to-rail common-mode input and output range comprises a differential input stage consisting of a first differential pair and a second differential pair for...
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7602248 |
Power amplifier and its idling current setting circuit
An idling current setting circuit ( 3 ) includes: current setting transistors (Q 3 , Q 4 ) connected to output transistors (Q 1 , Q 2 ) in a driver ( 2 ) in current mirror form; a plurality of...
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7595690 |
Voltage-clamping device and operational amplifier and design method thereof
A voltage-clamping device used in an operational amplifier is provided. The operational amplifier comprises a first transistor. The cross-voltage between the gate and the source of the first...
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7586373 |
Fully differential class AB amplifier and amplifying method using single-ended, two-stage amplifier
A fully differential amplifier includes a first single-ended current mirror type fully differential amplifier outputting a first output signal by two stage amplifying a difference between a first...
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7583145 |
Hybrid output stage apparatus and related method thereof
The present invention discloses an apparatus for generating an output signal according to an input signal, including a signal generating circuit for generating a first and a second control signal...
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7576610 |
Operational amplifier of class AB
A class AB operational amplifier is provided that includes first and second input transistors respectively coupled between first and second internal nodes and a first common node, first and second...
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7576609 |
Preamplifier for receiver and method thereof
A preamplifier used in a receiver is provided. The preamplifier comprises an input circuit and an output circuit. The input circuit receives an input differential voltage pair, pulls it down when...
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7573333 |
Amplifier and driving circuit using the same
An amplifier in an embodiment of the present invention has MOS transistors connected serially between a power supply VDD and a ground terminal GND; an output terminal Vout connected to a node...
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7570113 |
Overload recovery circuit for folded cascode amplifiers
In a method and apparatus for rapidly recovering an improved amplifier from an overload condition, a cascode amplifier (CASA) having a pair of inputs and an output is coupled to an overload...
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7564308 |
Self-biased operational amplifier
An operational amplifier in accordance with one embodiment of the invention includes folded cascode transistors and a self-biased common-mode feedback circuit coupled to the folded cascode...
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7557659 |
Slew-enhanced input stages and amplifiers
Provided herein are input stages, and operation amplifiers including input stages. In an embodiment, an input stage includes a complimentary differential input transconductor, first and second...
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7557658 |
Low voltage amplifier having a class-AB control circuit
A low voltage amplifier having a class-AB control circuit which generates minimal or no surge current when the output of the amplifier clips to ground or the negative rail. The amplifier includes...
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7551030 |
Two-stage operational amplifier with class AB output stage
An operational amplifier includes a differential amplifier including an active load, a current mirror including a first branch and a second branch, a first switch connected between a first power...
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7551024 |
Nested transimpedance amplifier
A nested transimpedance amplifier (TIA) circuit includes a zero-order TIA having an input and an output, and a first operational amplifier (opamp). The opamp includes an input that communicates...
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7548117 |
Differential amplifier having an improved slew rate
A differential amplifier receives a differential input signal and generates an output signal at an output node. An auxiliary circuit coupled to the differential amplifier operates to improve slew...
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7548114 |
Apparatus for slew rate enhancement of an operational amplifier
The present invention discloses an apparatus for slew rate enhancement of an operational amplifier, wherein an auxiliary control device and an auxiliary output device are added to the output stage...
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7545305 |
Data driver and display device
A data driver includes a positive-polarity reference voltage generation circuit that outputs positive-polarity reference voltages, a positive-polarity decoder that receives the positive-polarity...
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7545214 |
Class AB rail-to-rail input and output operational amplifier
An operational amplifier including an input stage. The input stage may include first and second differential input circuits and a first current mirror. When an input terminal of the operational...
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7538617 |
Class AB amplifier circuit with combined quiescent current and common mode control
It is an object of the present invention to provide an amplifier circuit that supplies a differential output signal (Voutp−Voutn) with a stable common mode potential (½×(Voutp+Voutn)) and a...
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7535302 |
Operational amplifier and display device
To reduce the apparent effect of offset voltage by making the offset voltage spatially scattered. An operational amplifier 1 includes: a first differential pair having N-channel MOS transistors...
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7532071 |
Operational amplifier circuit
A level shifter unit outputting a level shifted signal generated by level shifting of output signals of the first and second differential amplifier circuits, and an output circuit including...
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7528657 |
Baseband filter start-up circuit
An electrical circuit comprises a plurality of amplifiers. Each of the plurality of amplifiers comprises an input circuit in communication with an input of the amplifier and a start-up circuit in...
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7528656 |
Push-pull amplifier and method for low noise amplification
Provided is an amplifier including: an amplifier circuit receiving differential signals to generate amplified differential signals; a buffer generating buffered signals by buffering each signal...
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7528655 |
Amplifier with improved compensation topology and related amplifier circuit, system, and method
An embodiment of an amplifier includes an amplifier output node operable to provide an output signal, and an output stage. The output stage includes a drive buffer having an input node and an...
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7518454 |
Operational amplifier selecting one of inputs, and an amplifying apparatus using the OP amplifier the verification method
A current feedback-type operational amplifier comprising multiple input parts and one output part, wherein each of the multiple input parts comprises a first input terminal, a second input...
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7508265 |
Rail-to-rail class-AB operational amplifier
A rail-to-rail class-AB operational amplifier includes a first differential pair unit for receiving a pair of differential signals and generating a first control signal; a second differential pair...
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7504882 |
Differential amplifier circuit and semiconductor device
A differential amplifier circuit in which an input offset voltage is very small. The differential amplifier circuit includes an input-stage differential amplifier section and a cascode-connected...
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7501894 |
Method of forming an operational amplifier and structure therefor
In one aspect, an operational amplifier is configured to form a quiescent current that is a ratio of a current of a current source of the operational amplifier and to provide a load current to a...
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7489193 |
Operational amplifier
A disclosed operational amplifier includes: a pair of differential stages; a cascode amplifier stage; and an output stage. A threshold voltage of an output transistor constituting the output stage...
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7474153 |
Dual stage source/sink amplifier circuit with quiescent current determination
An amplifier circuit includes a first stage that receives a signal input and a control input and that generates first stage outputs. A second stage that communicates with the first stage and the...
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7474152 |
Operational amplifier circuit
An operational amplifier circuit has a differential input circuit including a first transistor, which receives a first input signal and generates a first voltage, and a second transistor, which...
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7471150 |
Class AB folded cascode stage and method for low noise, low power, low-offset operational amplifier
A class AB folded cascode circuit includes a differential current follower having first and second cascode transistors with emitters connected to first and second input conductors. An input of a...
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7466199 |
Low noise amplifier with low current consumption
The invention relates to an amplifier circuit comprising supply terminals ( 12, 14 ) for supplying the circuit with first and second supply potentials (Vdd, Vss); a current path, which runs from...
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7463094 |
Linearized class AB biased differential input stage
A linearized bipolar differential input stage that contains two high gain current mirrors coupled in series with the input voltage signal through the input transistors to allow the output...
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7453318 |
Operational amplifier for outputting high voltage output signal
An operational amplifier includes a differential amplifier circuit, receiving a low voltage signal, and a current mirror circuit provided on the downstream. The differential amplifier circuit also...
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7449952 |
Amplifying circuit having a pull-up circuit and a pull-down circuit for increasing slew rate
An amplifying circuit includes an operational amplifier, a pull-up circuit and a pull-down circuit. The operational amplifier generates a first pull-up signal, a first pull-down signal and an...
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7449951 |
Low voltage operational amplifier
An operational amplifier includes a differential amplifier for amplifying differential input signals to generate differential amplified signals. The operational amplifier also includes first and...
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7449950 |
Analog signal processing circuit
An analog signal processing block with differential signal inputs and including a differential amplifier with differential inputs is disclosed which is configurable to operate either in a...
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7446607 |
Regulated cascode circuit, an amplifier including the same, and method of regulating a cascode circuit
A regulated cascode circuit includes a first PMOS FET and a second PMOS FET connected in series between a first terminal that receives a first supply voltage and an output terminal, a first NMOS...
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7432922 |
Source driver and source driving method
A source driver for LCD devices, used for driving at least one data line, comprises an input for receiving a predetermined voltage; an output electrically being connected to the data line and...
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7429972 |
High slew-rate amplifier circuit for TFT-LCD system
A high slew rate amplifying circuit, for a TFT-type of LCD system, includes: an operational amplifier; a pull-up transistor connected to the output of the operational amplifier; a pull-down...
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7414474 |
Operational amplifier
An operational amplifier with a broad applicable band and little disturbing noise which is capable of preventing oscillation even when used in connection with a negative feedback path. The...
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7414473 |
Class AB folded-cascode amplifier having cascode compensation
A class AB folded-cascode amplifier having improved gain-bandwidth product, comprises a differential input circuit including a differential transistor pair coupled to a source of tail current and...
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7405622 |
Operational amplifier with less offset
A differential amplifier includes an input stage circuit including a first differential pair and a second differential pair which are complementary to each other; a first current mirror circuit...
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7358812 |
Class AB operational buffer
A class AB operational buffer comprises an output stage, a voltage supply circuit to provide a first voltage and a second voltage to drive the output stage, a first current source to provide a...
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7352243 |
Voltage comparator circuit
A voltage comparator that realizes high-speed operation with a simple structure includes an input differential stage having a first differential pair and a second differential pair, into which a...
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7348848 |
Buffer amplifier for source driver
A buffer amplifier for source driver is disclosed. The buffer amplifier has an N-channel differential amplifier and a P-channel differential amplifier as its input stages so as to achieve...
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7342449 |
Differential amplifier, and data driver of display device using the same
Disclosed is a Rail-to-Rail amplifier including a plurality of differential pairs of a first conductivity type and a plurality of differential amplifiers of a second conductivity type each with one...
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