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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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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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7602247 |
Variable gain amplifier and AC power supply device using the same
A variable gain amplifier includes first and second power supply terminals arranged to be connected to a power supply, a transconductance amplifier, first and second PN junction elements, a voltage...
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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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7583147 |
Buffer drive
The present invention relates to a CMOS buffer circuit for liquid crystal display (LCD) drivers, which includes a single stage operational transconductance amplifier (OTA) with a differential of...
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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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7567124 |
Symmetrical differential amplifier
A differential amplifier has improved power efficiency, reduced offset penalty and a symmetrical output differential signal. Such a differential amplifier may include: (a) a bias circuit that has a...
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7564309 |
Wide input common mode for input bias current cancellation
Described herein is technology for, among other things, input bias current cancellation. The technology includes a bipolar differential pair coupled with a supply voltage (V CC ). The bipolar...
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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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7554405 |
Adaptive biasing input stage and amplifiers including the same
An adaptive biasing input stage includes pairs of differentially coupled amplifying and sensing field effect transistors having gates with differential inputs applied thereon. In addition, a static...
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7548045 |
Low-consumption voltage regulator
A voltage regulator having an input voltage and adapted to supply a regulated output voltage, the regulator including an AB class amplifier and a power transistor having a non-drivable terminal...
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7545216 |
Amplifier with current mirror bias adjust
An amplifier includes a differential amplifier stage, a voltage amplification stage and a power output stage. The bias level of the output stage is proportional to current through the voltage...
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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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7545213 |
Operational amplifier
An operational amplifier according to an embodiment of the invention includes: a control signal input terminal receiving a digital control signal from an external device; first and second...
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7541872 |
Startup circuit for subregulated amplifier
A multi-stage circuit has a first stage powered by the output voltage of a next stage. A current source within the first stage provides a tail current for a differential amplifier within the first...
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7541871 |
Operational transconductance amplifier (OTA)
Apparatus and methods provide an operational transconductance amplifier (OTA) with one or more self-biased cascode current mirrors. Applicable topologies include a current-mirror OTA and a...
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7538614 |
Differential amplifier with independent output common mode adjustment
A fully differential amplifier with a high common mode rejection ratio with an independent output voltage setting is disclosed. The amplifier may be arranged with a single ended output or a...
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7528654 |
Analog transconductance amplifier
An analog transconductance amplifier includes an input stage including a first transistor and a second transistor connected in series to the first transistor. The first and second transistors are...
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7525379 |
Low voltage CMOS differential amplifier
There is provided a device including a PMOS differential amplifier and an NMOS differential amplifier. The NMOS differential amplifier is coupled to the PMOS differential amplifier. The device is...
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7525346 |
Driver circuits and methods
In one system embodiment, the system is characterized by: a differential amplifier including but not limited to at least one amplifying transistor having an emitter coupled directly to a ground. In...
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7521998 |
Operational amplifier and scanning electron microscope using the same
An operational amplifier and a scanning electron microscope which are capable of dealing with high voltage and large current, and which allow implementation of stable and precise amplification, the...
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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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7492225 |
Gain-controlled amplifier
A gain-controlled amplifier is disclosed including: a set of switches; first and second transistors whose second terminals are coupled to each other via a resistive element; a first current mirror,...
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7486140 |
Differential amplifier
A differential amplifier of the present invention comprises transistors where to each of which one of two inputs to said differential amplifier is provided; current mirror circuits where each of...
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7479832 |
Differential amplifying system
A differential amplifying system has a differential amplifier for amplifying a voltage signal inputted from an input terminal and outputting the amplified voltage signal through an output terminal;...
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7479831 |
Class AB differential current conveyor input stage for a fully differential current feedback amplifier
Disclosed herein is technology for, among other things, a current feedback fully differential amplifier. The amplifier includes an input stage operable to sense an input current at a first terminal...
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7477103 |
Amplifier circuit
An amplifier has a voltage to current converter coupled between a first potential and a reference potential and includes a control input coupled to a voltage at an input of the amplifier for...
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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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7466200 |
Composite output stage for hard disk drive preamplifier
An apparatus for supplying a load current. The apparatus comprises a first differential amplifier producing a differential output signal and an output buffer comprising a first and a second...
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7466198 |
Differential gain boosted amplifier
A differential gain boosted amplifier is provided. The differential amplifier includes at least one current mirror, at least one differential pair, at least one cascode, at least one differential...
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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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7446606 |
Methods and apparatus to provide slew enhancement for low power amplifiers
Methods and apparatus to provide increased current to a cascode amplifier to maximize slew rate are disclosed. The amplifier has a first input coupled to an input switch and a load circuit for...
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7443238 |
Amplifier stage, operational amplifier and method for amplifying a signal
An amplifier stage includes a first and a second signal path having a series connection of a first transistor of a first conduction type which forms a control input for receiving an input signal to...
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7443234 |
Differential amplifier, digital-to-analog converter and display device
Disclosed are a multi-level differential amplifier that includes first to third input terminals; an output terminal; first to third differential pairs; a current source circuit for supplying...
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7436261 |
Operational amplifier
An operational amplifier includes: a differential amplifier circuit configured to receive an inverting input voltage (VIN−) and a non-inverting input voltage (VIN+); and an auxiliary circuit for...
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7425867 |
Differential input/differential output converter circuit
A differential input/differential output converter circuit. The circuit comprises differential complementary input modules each comprising cross-coupled devices for biasing current mirror masters...
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7423486 |
Silicon-on-insulator differential amplifier circuit
A differential amplifier formed on a silicon-on-insulator substrate, including means to prevent the bodies of its differential input transistors from charging to unwanted potentials in the standby...
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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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7411453 |
Tail-current steering circuit and method for rail-to-rail operational amplifier input stage
An amplifier includes first and second pairs of differentially coupled input transistors. The first current mirror generates a reference current which is mirrored by a second current mirror to...
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7405620 |
Differential amplifier and method
A method of forming a differential amplifier on a substrate which has a greater tolerance for applied voltages and a chip so formed. The differential amplifier circuit on a substrate has additional...
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7402984 |
Oscillation sensor for linear regulation circuit
An oscillation sensor for a regulator that provides dynamic control of a connection/disconnection of a compensation capacitance. The compensation capacitor is disconnected under normal operation...
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7391404 |
Thin film transistor circuit and semiconductor display device using the same
There is provided a thin film transistor circuit used for a driver circuit for providing a semiconductor display device without a picture blur and with high fineness/high resolution. In the thin...
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7389087 |
Adaptive radio transceiver with filtering
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
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7388432 |
Current feedback amplifier with extended common mode input range
A Current Feedback Amplifier (CFA) is arranged to receive an input signal having a common mode (CM) range that is greater than the voltage across the supply rails. The CFA contains a rail-to-rail...
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7368990 |
Differential amplifier and data driver employing the differential amplifier
Disclosed is a differential amplifier which includes first and second input terminals, an output terminal, first and second differential pairs, and first and second current sources for supplying...
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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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7352245 |
Auto-range current mirror circuit
An auto-range current mirror circuit has a current sensing circuit, a front and rear stage current mirrors each has an adjustable amplifying rate. The current sensing circuit presets a threshold...
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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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7345543 |
Fast transconductance amplifier
An amplifier including an input stage having two inputs, each input being connected to the control terminals of first and second transistors, a current output of the first transistor being...
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