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4543561 |
Single-supply IC digital-to-analog converter for use with microprocessors
A single-chip 8-bit DAC with bipolar current sources, an output buffer amplifier for developing an output voltage, a regulated reference for producing a calibrated output, and operated by a...
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4536663 |
Comparator circuit having full supply common mode input
The input voltage signals to a comparison circuit may vary between levels substantial equal to the first and second supply voltages (e.g. typically 5 volts and ground). A first transistor circuit...
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4536664 |
A high speed, non-inverting circuit for providing an interface between TTL logic gates and Schottky transistor logic gates
A high speed, noninverting circuit for providing an interface between transistor-transistor logic gates and Schottky transistor logic gates. In one embodiment the output of a TTL circuit is coupled...
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4533844 |
Peak storage amplifier
A peak storage amplifier for storing successive peaks of a waveform for a sufficient period of time to insure accurate data transmittal is provided. A differential amplifier is responsive to the...
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4532479 |
Differential amplifier circuit with rail-to-rail capability
A differential amplifier circuit contains a pair of complementary input portions (3, 5 and 4, 6). The input portions amplify a common differential input signal to produce corresponding amplified...
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4531097 |
High frequency amplifier
A high frequency amplifier comprising a pair of input transistors forming a differential amplifier stage, with an impedance connected between the common terminals of the input transistors to vary...
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4529891 |
Comparator circuit
A comparator circuit comprising an operational amplifier for comparing a reference input signal at a given voltage and an input signal at an unknown voltage to produce a signal representing the...
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4529946 |
Differential amplifier circuit
A differential amplifier circuit producing sufficient output current with a broad linear working range, which includes first and second transistors coupled at their emitters in differential...
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4525663 |
Precision band-gap voltage reference circuit
A band-gap voltage reference circuit which incorporates a band-gap differential amplifier supplied with constant, temperature-independent current, a high gain differential-to-single-ended...
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4524328 |
MOS Power amplifier circuit
A MOS power amplifier circuit comprised of a load driver including two p-channel MOSFETs connected in series, a preamplifier for amplifying an analog input signal and supplying the amplified one to...
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4524318 |
Band gap voltage reference circuit
A band gap voltage reference circuit includes first and second NPN transistors coupled as differential pair having ratioed emitters, to produce an offset voltage, and third and fourth...
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4524330 |
Bipolar circuit for amplifying differential signal
A bipolar differential amplifying circuit contains a pair of input transistors (3 and 4) for receiving a differential input signal, a pair of differentially-configured first and second transistor...
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4524292 |
Analog arithmetic operation circuit
An analog arithmetic operation circuit with small operation errors. An analog arithmetic operation circuit comprises: a first transistor; a second transistor, a base of which is connected to a...
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4523105 |
Full wave rectifier circuit for small signals
An amplifier, including a pair of emitter coupled non-complementary transistors operated at constant emitter, base and collector potentials, provides a bidirectional output current proportional to...
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4521739 |
Low offset voltage transistor bridge transconductance amplifier
A transconductance amplifier capable of operating from a single supply voltage includes a differential input stage energized by a current mirror current source. Small voltages are sensed across the...
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4521697 |
PNP comparator circuit having beta current error cancellation
A comparator circuit comprising a pair of PNP input transistors having their collector-emitter paths coupled between first and second conductors. The output of the comparator is coupled to the base...
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4518876 |
TTL-ECL Input translation with AND/NAND function
A new and improved translation circuit that accepts TTL signals and converts them to ECL levels while performing an AND/NAND function is provided, comprising at least two emitter-coupled transistor...
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4517524 |
High frequency operational amplifier
An operational amplifier includes a differential input stage and a composite differential amplifier second stage. The second stage includes first and second NPN transistors which receive at their...
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4516081 |
Voltage controlled variable gain circuit
A voltage controlled variable gain circuit suitable for construction as an integrated circuit includes a first current divider comprised of two NPN transistors; a second current divider comprised...
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4513252 |
Active load circuit
An active load circuit including a current mirror circuit used for a load to a differential amplifier, an output transistor outputting the amplified signal in response to the differential input to...
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4510550 |
Relay driver
A relay load is connected in the collector path of a first transistor (Q1) of high current carrying capacity. A second transistor (Q2) of similar conductivity type is effectively coupled across the...
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4506208 |
Reference voltage producing circuit
A reference voltage producing circuit includes a voltage signal producing circuit, a differential amplifier and an emitter follower circuit. The voltage signal producing circuit includes a first...
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4495429 |
Limiter amplifier
A limiter amplifier with a power supply has a plurality of cascade-connected differential amplifiers for limiting the amplitude of an input signal. Each of the amplifiers has a first constant...
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4494075 |
Volume control circuit
A volume control circuit includes an input circuit, which may be a differential amplifier, for converting an input signal to 1st and 2nd currents. The 1st current contains a 1st signal component...
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4492929 |
Operational amplifier having enhanced gain through current feedback
An integrated operational amplifier circuit includes an input stage comprising first and second junction field effect transistors coupled to a current mirror circuit and an output stage including...
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4485313 |
Low-value current source circuit
A current source circuit is arranged so as to provide a low-level current on the order of 0.1 microampere at a high level of accuracy. A series connection of first and second transistors, each...
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4477782 |
Compound current mirror
Two gate-coupled pairs (12, 14; 16, 18) of MOS transistors are configured in a compound current mirror (10, 30) arrangement. Each pair includes an input (12; 16) and an output (14; 18) transistor....
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4476439 |
Level shifting circuit
A level shifting circuit capable of operating with a wide range of impedances of a signal source without backflow of current and without a buffer circuit. A feedback element is coupled between an...
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4475087 |
Voltage follower circuit
A voltage follower circuit comprises first and second emitter-coupled transistors. The first transistor has its base connected to receive an input voltage, and the second transistor has its base...
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4475077 |
Current control circuit
A current control circuit comprises a first transistor having its collector connected to an input current source, its emitter connected to a negative power source terminal and its base connected to...
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4472648 |
Transistor circuit for reducing gate leakage current in a JFET
A transistor circuit is provided comprising a primary JFET whose gate leakage current is required to be minimized, and a reference current generator means connected to the source of the primary...
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4471321 |
Input current compensation circuit for superbeta transistor amplifier
An improved input current compensation circuit is provided for a superbeta transistor amplifier. The circuit has a pair of compensation transistors which simulate the amplifier transistors and...
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4463383 |
Image pickup apparatus
Solid-state image pickup apparatus, such as an MOS imager, has a two-dimensional array of picture element units each formed of a photo sensitive element and a gating element, and scanning circuits...
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4462002 |
Trimming circuits for precision amplifier
Imbalances in the potential appearing across the drain electrodes of source coupled FET transistors arranged in a differential amplifier configuration tends to produce input offset voltages. Where...
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4461989 |
Voltage sense circuit for a bubble memory voltage booster
In a voltage boost circuit for use in conjunction with a bubble memory operational driver, an output transistor alternately turns on and off so as to permit current to flow through an inductor...
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4459555 |
MOS Differential amplifier gain control circuit
A modulator circuit is disclosed in which a pair of differentially modulated direct currents are mirrored to an output. A control potential acts to vary the modulation without changing the direct...
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4458212 |
Compensated amplifier having pole zero tracking
A circuit for producing a compensated output signal includes a first and second stage of amplification (18) and (20) and a compensation circuit (16). The first stage of amplification (18) has a...
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4458211 |
Integrable signal-processing semiconductor circuit
Integrable signal-processing semiconductor circuit, including four transistors being combined into two pairs, the transistors of each pair being connected together through their current inputs...
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4456887 |
Differential amplifier
Current mirror circuits are added to a differential amplifier and the amplifier differential outputs are taken from one or both of the current paths in the current mirror circuit so that the...
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4455681 |
Dual threshold wide band/narrow band AGC
A radio receiver incorporates an AGC system having an upper wide band threshold and a narrow band threshold. Both thresholds are made temperature independent. The narrow band threshold is related...
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4453134 |
High voltage operational amplifier
An operational amplifier is disclosed which is capable of handling input voltages in excess of 200 volts, comprising at least in the input stage thereof a plurality of low voltage transistors...
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4453092 |
Comparator circuit having reduced input bias current
A comparator circuit which includes a differential pair of transistors forming differential inputs of the comparator and a voltage level shift circuit coupled in series connection path with the...
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4451799 |
B-Class complementary circuit
The present invention purports to provide a novel B-class complementary circuit of direct-coupling type having good characteristics of low dispersions of voltage gain and low temperature...
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4451800 |
Input bias adjustment circuit for amplifier
In feedback type amplifier including a differential transistor pair, the bias current to at least one of the differential transistors is provided by a source of current proportional to the DC...
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4450366 |
Improved current mirror biasing arrangement for integrated circuits
A current mirror biasing arrangement for an electronic circuit, particularly one intended for an integrated circuit employs a current mirror constituted by series connected pnp and npn transistors...
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4446443 |
Amplifier having reduced power dissipation and improved slew rate
An integratable amplifier is disclosed for developing a high level output signal with reduced power dissipation. The amplifier includes a first circuit (108, 110) which responds to an input signal...
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4446419 |
Current stabilizing arrangement
In a known current source arrangement which generates a current whose temperature coefficient is only equal to zero at one specific temperature, steps are taken, in accordance with the invention,...
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4441041 |
Circuit arrangement for generating a direct control voltage which is dependent on an alternating voltage
The invention relates to a circuit arrangement in a compander system for generating a direct control voltage which is dependent on an alternating voltage with the circuit arrangement including a...
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4438349 |
Hysteresis circuit having a stable output free from noise superposed on input signal
A hysteresis circuit has first and second input terminals and an output terminal. An input signal is supplied to the first input terminal, while the second input terminal receives a reference...
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4437023 |
Current mirror source circuitry
A current source circuit includes a current mirror circuit having a master transistor and at least one slave transistor. The master transistor is coupled to a differential amplifier. The...
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