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4797583 |
Level converting circuit for converting voltage levels, including a current amplifying arrangement
A level converter for transforming differential input voltages into an output voltage comprises a voltage-current conversion circuit for transforming the differential input voltages into...
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4783602 |
Operational transconductance amplifier for use in sample-and-hold circuits and the like
An improved operational transconductance amplifier (OTA) for use in sample-and-hold circuits or the like requiring very low output leakage currents and equalized output current transients when the...
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4783637 |
Front end stage of an operational amplifier
The front end of an operational amplifier having an improved slew rate and high gain current output capabilities. The amplifier includes a slew enhancement or large signal stage connected in...
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4780625 |
Integrated circuit sensor circuit
An integrated circuit sensor circuit (10) is disclosed which is operable in differential or single-ended modes at DC input potentials which can be below the integrated circuit substrate bias...
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4780686 |
Semiconductor differential amplifier
A semiconductor differential amplifier includes first and second MOS transistors of a first conductivity type acting as driver transistors, and third through sixth MOS transistors of a second...
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4779059 |
Current mirror circuit
A current mirror circuit including an operational amplifier connected to transistors of the current mirror circuit such that operating points of the transistors, that is, the emitter electrodes,...
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4777472 |
Modified cascode amplifier
An input signal to an amplifier is coupled to a gate electrode of a first PMOS transistor operating as a common source inverting amplifier. The drain electrode of the first transistor is coupled to...
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4766394 |
Operational amplifier circuit having wide operating range
An operational amplifier circuit operable with a common-mode input voltage variable over a substantially full range between given source voltages, wherein complementary first and second...
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4763024 |
Gain control cell
A gain control cell comprises an input stage (10) having first (12) and second (13) input nodes and including a first current mirror (T 14 ), and an output stage (11) having an output node (14) and...
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4760286 |
Comparator with input offset current elimination
A comparator circuit for use with other comparator circuits on a common resistive divider chain includes PNP input transistors operating in conjunction with a current mirror circuit, and input...
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4757275 |
Wideband closed loop amplifier
A wideband closed loop amplifier is described which has improved accuracy over prior amplifiers. The closed loop amplifier includes (a) first and second differential amplifiers, (b) floating bias...
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4757274 |
Input compensation circuit for superbeta transistor amplifier
An improved input current compensation circuit is provided for a dual branch amplifier, particularly an amplifier employing superbeta transistors. The compensation circuit has a superbeta...
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4757273 |
Complementary transconductance amplifiers
A complementary differential amplifier comprising a first and a second pair of complementary bipolar transistors, each of said transistors having a base, emitter and a collector, a resistor network...
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4755767 |
High gain amplifier using two current mirrors
An op amp is disclosed in which a high-gain differential input stage drives a high-gain common emitter stage that in turn drives an emitter follower buffer output stage. Adequate voltage gain is...
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4755766 |
Differential to single-ended converter
A differential to a single-ended converter circuit includes linearizing PN junctions that compensate for input signal voltage loss in the input stage. A variable voltage source and a resistor are...
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4749957 |
Semiconductor transconductor circuits
A voltage-tuned transconductor with reduced even-order and odd-order nonlinearities is obtained by using a pair of control MOS transistors each interconnected between a separate pair of matched...
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4746877 |
Direct-coupled wideband amplifier
An improved gain stage includes a pair of differentially-connected, matched, bipolar transistors and local positive feedback from the output to the collector electrode of one input transistor to...
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4743862 |
JFET current mirror and voltage level shifting apparatus
A JFET current mirror is employed in the voltage level shifting section of an operational amplifier. The JFET current mirror includes a first and second JFET coupled at their gates for conducting...
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4742309 |
Line receiver
An improved line receiver with high common mode rejection is operable at voltages above the power supply voltage (VCC) as well as below ground. Input resistors provide high input impedence as well...
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4742281 |
Speed control apparatus for a DC motor
A speed control apparatus for a DC motor operable with a low voltage battery has a reference voltage generating circuit capable of operable with a low voltage such as 1 V and is settable for output...
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4734654 |
Linear CMOS transconductance element
A simple CMOS linear, tunable, high-frequency transconductance element is described. By using a pair of composite n-channel/p-channel devices, the transconductance circuit achieves its linearity by...
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4731589 |
Constant current load and level shifter circuitry
Level shifter circuitry, as for an operational amplifier, imposes no current load on the preceding amplifier stage associated with its level shifter function. A common-collector-amplifier first...
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4728815 |
Data shaping circuit
A circuit for producing output pulses in response to an alternating signal supplied to the input thereof which is comprised of a pair of complementary transistors cascoded between a pair of current...
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4727335 |
Gain-controlled amplifier
A gain-controlled amplifier amplifies an input signal at a gain which varies exponentially in accordance with a control voltage applied thereto and selectively outputs one of non-inverted and...
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4724397 |
Trimmable differential amplifier having a zero temperature coefficient offset voltage and method
A differential amplifier in which the offset voltage is adjustable and which has a zero temperature coefficient after being adjusted. The differential amplifier includes a pair of differentially...
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4721921 |
Amplifier having improved gain/bandwidth product
In an operational amplifier having an input stage of the type wherein first and second differentially coupled transistors cooperate with a current mirror circuit, an output transistor is provided...
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4721920 |
Broad-band integrator
The broad-band integrator uses bipolar transistors with single low-value integration capacitor, that is why it is easy to integrate. A bias circuit, which can be integrated, allows both the...
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4717886 |
Operational amplifier utilizing resistors trimmed by metal migration
First and second resistors of a resistive network formed in a semiconductive substrate may be individually trimmed. The first and second resistive regions coupled at one end thereof have their...
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4716381 |
High-current operational amplifier
An operational amplifier suitable for inclusion in an integrated circuit device operating as a transceiver at a coaxial media interface to a network meeting IEEE 802.3 standards. To be included in...
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4716380 |
FET differential amplifier
A differential amplifier (10) has two input terminals (16,18), an output terminal (20) together with power terminals (12,14). The differential amplifier comprises two or more stages with each stage...
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4713626 |
Operational amplifier utilizing JFET followers
An operational amplifier includes a pair of differentially coupled PNP transistors driving a current mirror circuit. The base of the each of the transistors is coupled to the source of a JFET...
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4713797 |
Current mirror sense amplifier for a non-volatile memory
A non-volatile memory has memory cells which have a first or a second conductivity. A reference current is established through an unprogrammed reference cell which has the first conductivity. A...
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4710728 |
Amplifier having improved gain-bandwidth product
An amplifier includes an input stage having first and second differentially coupled transistors for receiving a differential input signal and providing a differential output to third and fourth...
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4706036 |
Differential amplifier having ratioed load devices
A differential amplifier is provided which has a low systematic offset voltage and a small variation in quiescent current with respect to variations in processing and temperature while providing...
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4701720 |
Capacitive feedback to boost amplifier slew rate
An integrated circuit voltage follower buffer amplifier is provided with a feedback capacitor that is coupled to produce positive feedback current that acts to enhance slew rate. In an op amp a...
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4701719 |
Differential amplification circuit
A first differential amplifier amplifies the differential signal component of the input signal supplied to input terminals. The differential component is then supplied to output terminals. The...
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4700144 |
Differential amplifier feedback current mirror
A differential amplifier feedback current mirror includes a feedback current source that provides a correction current to one input of a differential amplifier. The correction current is...
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4695750 |
Voltage level converting circuit
A voltage level converting circuit includes first and second potential terminals between which a power source voltage is applied, first and second terminals for receiving an input signal and an...
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4692711 |
Current mirror circuit
This invention is described a current mirror circuit. In a current mirror circuit wherein there are provided first and second transistors which have their emitters in common and constitute a...
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4689580 |
Active filter circuit
An active filter circuit having emitter coupled first and second transmittors and emitter coupled third and fourth transistors, wherein the base and collector electrodes of the third transistor are...
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4689607 |
Bidirectional transconductance amplifier
An apparatus for converting an input voltage into a related output current, is disclosed and generally comprises: a resistance means in series with the voltage input; first and second double output...
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4689579 |
Analog integrated circuit
A high-density analog integrated circuit having built-in resistor elements formed simultaneously with the formation of the base of transistor is disclosed in which a high-resistance element is...
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4689506 |
Control circuit for use with electronic attenuators and method for providing a control signal proportional to absolute temperature
A control circuit for developing a modulated voltage which is proportional to absolute temperature that includes a thermal current source for producing current having a predetermined temperature...
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4684831 |
Level shift circuit for interfacing between two different voltage levels using a current mirror circuit
A novel translator for translating linear logic signal levels to TTL-compatible levels in an integrated logic device having an I/O section including a mix of ECL and TTL circuit. The translator...
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4682059 |
Comparator input stage for interface with signal current
A current interface has an impedance buffering circuit which maintains a very low input impedance at an input node, while producing currents to two current outputs which increase and decrease,...
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4680640 |
Apparatus for reducing beam current measurement errors
Errors occurring in the beam current measurement in a video output stage can be reduced by increasing the recharging rate of the capacitive load of a video amplifier, constituted by the picture...
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4679092 |
Reduced distortion display circuit
The distortion of an emitter-follower output stage of a video amplifier for driving a cathode of a picture display tube can be reduced without rendering a beam current control via this output stage...
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4677323 |
Field-effect transistor current switching circuit
An MOS current steering circuit (10) includes a current mirror arrangement with an input branch (12) and an output branch (16). In the input branch, the conduction channels of a current-limiting...
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4677321 |
TTL compatible input buffer
An input buffer circuit, especially well-suited for use as a TTL-TO-CMOS interface circuit, has a differential transistor pair at the input for stabilizing the circuit switching point relative to...
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4668919 |
High speed operational amplifier
A high speed low power linear two micron CMOS operation amplifier comprises an input differential amplifier stage having feedback current mirror loads connected to a four vertically stacked...
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