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5703532 |
Fully differential self-biased signal receiver
A self-biased, fully differential, complementary receiver apparatus and method is presented. The receiver accepts differential inputs that can vary over the full rail-to-rail common mode voltage...
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5703534 |
Operational transconductance amplifier with good linearity
An operational transconductance amplifier with a good linearity, comprising a first MOS transistor having its one terminal connected to a ground voltage source and its gate terminal for receiving a...
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5703533 |
BiCMOS operational amplifier for switch/capacitor circuits
The operational amplifier which has a high input impedance as well as a high bandwidth, is designed particularly for capacitive loads and, above all, maintains its operating point within narrow...
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5701102 |
High-speed transmission line receiver with wide range of common mode compensation
A high-speed transmission line receiver includes a basic differential amplifier stage along with a gain enhancement stage, which is generally similar to the differential amplifier stage. One of the...
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5699014 |
Linear amplifier
A low-noise, low-power complementary metal-oxide-semiconductor (CMOS) integrated circuit common source differential amplifier is disclosed which is capable of amplifying low amplitude cardiac...
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5691658 |
Current mode amplifier, rectifier and multi-function circuit
A balanced current amplifier mirrors either a fully differential or single ended input signal into common output circuits in a manner to generate a fully differential output signal without any d.c....
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5682120 |
Differential amplifier circuit using lateral-type bipolar transistors with back gates
A differential amplifier circuit of the present invention includes a device ("transistor") having a back gate electrode formed above the base region of a bipolar transistor between the emitter and...
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5675289 |
Differential amplifier
A differential amplifier includes two differential amplifier stages each having an input side with two complementary inputs and an output side with at least one output. The stages are connected...
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5670910 |
Operational amplifier free from dispersion in quiescent current consumed by output stage
An input stage, an error compensable level-shift stage and an output stage form in combination an operational amplifier circuit, and the error compensating level-shift stage includes an inverting...
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5668500 |
CMOS buffer amplifier
A thermal weapon sight employs a rotating multifaceted scan mirror (22) to reflect infrared light (14) from an object to a bank of CCD detectors (50) of which the output is multiplexed (80) and...
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5666086 |
Filter circuit employing a current amplifier having a fully differential output without a D.C. bias
A balanced current amplifier mirrors either a fully differential or single ended input signal into common output circuits in a manner to generate a fully differential output signal without any d.c....
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5652545 |
Wide-band amplifier
A differential amplifier is connected to a push-pull-type source follower circuit that receives biphase signals. The source follower circuit has a first set of FETs including a first source...
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5644269 |
Cascode MOS current mirror with lateral bipolar junction transistor to enhance ouput signal swing
A MOS transistor current mirror having a low output voltage is described. A first and second MOST's have their drains and gates connected respectively to form MOS diodes. The drain of the first...
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5642077 |
Wide band constant gain amplifier
An amplifier comprises an input transistor for receiving an input signal and a current source having a first and a second terminal, coupled to the input transistor at said first terminal and being...
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5642078 |
Amplifier having frequency compensation by gain degeneration
An amplifier having an inverting and a non-inverting input and at least one output is compensated by dynamically varying the transconductance of a gain stage in accordance with the gain of the...
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5635880 |
CMOS microwave multiphase voltage controlled oscillator
A microwave differential amplifier comprises a first and a second matched NMOS device, each connected with the source to a common bias node, the gate to an input port for receiving a differential...
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5635873 |
Operational amplifier having dummy isolation stage
An integrated circuit terminator for a SCSI bus with resistors made of laser-blowable fuses in an array and a reference voltage source made with a bandgap generator and a two stage amplifier...
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5631607 |
Compact GM-control for CMOS rail-to-rail input stages by regulating the sum of the gate-source voltages constant
Compact g m -control circuits for CMOS rail-to-rail input stages operating in strong inversion are provided. The G m -control circuit makes the sum of the gate-source voltages of the...
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5631606 |
Fully differential output CMOS power amplifier
A fully differential output CMOS power amplifier suitable to be used in a non-volatile memory mixed mode chip for voice record and playback to drive a very low impedance load such as an 8 ohm...
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5623279 |
Capacitive load driving circuit including input selection circuit and liquid crystal display device using the driving circuit
A capacitative load driving circuit is provided in a liquid crystal display device and has an input selection circuit having a wide and effective voltage range of an input signal. The driving...
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5621358 |
Transconductor stage with controlled gain
A controlled gain transconductor (20) which comprises a transconductance stage (3) having at least two input terminals (I1, I2) and at least two output terminals (O1, O2), an active load (4)...
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5621374 |
Amplifying circuit for simulating a unity gain buffer amplifier
An amplifying circuit includes a low gain amplifier having positive and negative inputs and an output. A high impedance path provided by, for example, a low gain unity buffer amplifier feeds from...
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5621357 |
Class AB output amplifier stage
An AB class stage is described which comprises two complementary MOSFET final transistors connected in a push-pull manner between two supply terminals. In order to attain high linearity, low...
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5612648 |
Transconductance-capacitance filter with extended control range
A G m -C filter is formed using transconductor elements having first and second degeneration FETs to which first and second control signals are applied. A phase-locked-loop is used to generate the...
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5608350 |
Operational amplifier with control sequence circuit
An operational amplifier includes a first output transistor connected between a higher potential power source terminal and an output terminal and a second output transistor connected between a...
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5608352 |
Differential input circuit capable of broadening operation range of input common mode potential
A differential input circuit includes a first differential pair having first and second transistors for receiving a differential input signal, and for transmitting a differential output signal. A...
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5604464 |
Cascode operational amplifier with multiple input stage
Disclosed herein is a cascode operational amplifier design with multiple input stages, and methods of operating the same, resulting in enhanced output gain and unity gain bandwidth operational...
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5602509 |
MOS operational transconductance amplifier using an adaptively-biased differential pair
An MOS OTA that enables to provide superior transconductance linearity within a wider input voltage range without increase in circuit scale and to be formed on a semiconductor integrated circuit...
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5600280 |
Differential amplifier and variable delay stage for use in a voltage controlled oscillator
A differential amplifier or delay cell for use in a voltage controlled oscillator comprises a pair of clipper transistors coupled across the output nodes of the amplifier for limiting the voltage...
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5598129 |
Low current drain operational transconductance amplifier
An operational transconductance amplifier (500) includes an input stage (502) having a first and second amplifiers (504, 508) driving class-AB, push-pull amplifiers (506, 510). The input stage...
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5598117 |
MOS differential voltage-to-current converter circuit with improved linearity
A MOS differential voltage-to-current converter circuit has first and second MOS transistors forming a differential pair and a resistor connected between the sources of the first and second MOS...
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5596289 |
Differential-difference current conveyor and applications therefor
A differential-difference current conveyor combines features of a differential-difference amplifier and a current conveyor. The differential-difference current conveyor receives four input signals...
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5594386 |
Pulse width modulated amplifier
A class-D pulse width modulated amplifier. The amplifier includes a current switch, an integrator and a comparator connected in a feedback loop. The feedback loop generates an ultrasonic frequency...
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5594383 |
Analog filter circuit and semiconductor integrated circuit device using the same
A Gm-controllable amplifier is used in an OTA-C filter. Specifically, the amplifier is one in which a constant voltage from a bias circuit is applied to the gates of load MOSFETs connected to the...
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5589785 |
Low-voltage CMOS comparator
A MOS comparator which includes a capacitor connected in an electrical path between two amplification stages. The comparator also includes a voltage source, and a switch is provided between the...
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5587687 |
Multiplier based transconductance amplifiers and transconductance control circuits
Multiplier based transconductance amplifiers utilizing the combination of FET differential input stages and Gilbert multiplier output stages are disclosed. The amplifiers provide a high input...
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5587688 |
Differential automatic gain-control amplifier having an enhanced range
An enhanced differential amplifier circuit includes an injected inverted signal to the differential amplifier. As the AGC amplifier attenuates, the inverted signal becomes increasingly significant...
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5581212 |
Fully differential CMOS transconductance-transimpedance wide-band amplifier
A fully differential, wide-band transconductance-transimpedance amplifier with a tuneable gain is disclosed. The amplifier includes a transconductance stage for generating a current signal from an...
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5578964 |
CMOS differential operational amplifier
A CMOS differential operational amplifier has a fully differential structure to improve the output swing and a cascode amplification structure to improve the operating speed. This amplifier...
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5578965 |
Tunable operational transconductance amplifier and two-quadrant multiplier employing MOS transistors
A tunable MOS operational transconductance amplifier which outputs a differential output current in response to a differential input voltage. The amplifier has a tail current source, a first...
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5574401 |
Large common mode input range CMOS amplifier
A CMOS amplifier input stage including an NMOS differential pair connected in parallel with a PMOS differential pair. Each pair is connected to a tail-current transistor of the same type, and the...
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5568089 |
Fully differential amplifier including common mode feedback circuit
In a fully differential amplifier so configured that an operating point potential of positive and negative output terminals of a differential amplifier having an active load is set by a common-mode...
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5565813 |
Apparatus for a low voltage differential amplifier incorporating switched capacitors
A low voltage differential amplifier 10 or comparator is accomplished by providing an differential amplifier 10 that includes a transistor bias simulator 32 and a capacitance circuit 36. The...
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5561396 |
Rail-to-rail input stages with g.sub.m -control by multiple input pairs
A transconductance (g m ) control circuit for bipolar or CMOS rail-to-rail input stages is provided. The g m is controlled by the use of multiple input pairs and can be used in CMOS or bipolar...
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5557234 |
Differential amplifier with mismatch correction using floating gates
Differential amplifier (10) incorporates five metal oxide field effect transistors (MOSFETs) (M1 to M5). The transistors (M1 to M5) are a source-coupled pair of input transistors (M1, M2) with...
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5550510 |
Constant transconductance CMOS amplifier input stage with rail-to-rail input common mode voltage range
A differential amplifier having two complementary differential pairs connected for rail-to-rail common mode input voltage range operation including a constant transconductance maintaining bias...
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5550511 |
Differential amplifier having single phase input and two output phases
A differential amplifier includes switching FETs provided at an input side and at a reference side, respectively, forming a differential pair; an FET serving as a constant current source for...
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5546047 |
Method and apparatus of an operational amplifier with wide dynamic range
An operational amplifier (10) having an inverted output (20) ranging from a return voltage up to a rail supply voltage includes an amplifying stage (12) and: a linear output inverter (14). The...
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5541555 |
High performance transconductance operational amplifier of the CMOS integrated type
High-performance operational transconductance amplifier monolithically integrable with CMOS technology comprising a differential input stage connected to a pair of cascode stages and a differential...
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5537078 |
Operational amplifier with JFET inputs having low input bias current and methods for using same
This invention relates to operational amplifiers (opamps) which use junction field effect transistors (JFETs) for the differential input pair to achieve a low input bias current. More particularly,...
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