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5349303 |
Electrical charge transfer apparatus
A charge transfer circuit includes an input terminal for receiving an input electrical charge, a transconductance amplifier having first and second inputs including an inverting input, and first...
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5349305 |
Fully differential current sample/hold circuit
A sampled-data, current-mode circuit implements analog functions in a standard digital process. Among sampled-data current-mode circuits, the current S/H (CSH) circuit is a key component. This...
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5343164 |
Operational amplifier circuit with slew rate enhancement
A low power operational amplifier adjusts its output slew rate by providing additional bias current to its differential amplifier stage when the amplitude of the differential input signal exceeds a...
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5341051 |
N-dimensional basis function circuit
The circuit generates an output value of an N-dimensional basis function. The circuit includes a string of sub-circuits, each sub-circuit computing a one-dimensional basis function. Each lower...
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5339044 |
High linearity differential circuit
A differential circuit having a predefined voltage gain of the order of unity and with a high linearity includes a differential pair of input transistors fed by a DC current source (S) each through...
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5339042 |
Input stage offset compensation device
A device for compensating the offset of an input stage having two current output legs, the first of which is connected to the input of a real stage pushing into this first leg a parasitic current;...
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5337007 |
High efficiency class AB transconductance amplifier
A class AB transconductance amplifier (200) has first and second differential input amplifier stages (100-112) adapted for receiving first and second differential input signals (Vin+, Vin-). First...
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5337008 |
High gain rail-to-rail CMOS amplifier
A CMOS operational amplifier input senses a rail-to-rail differential voltage and provides an amplifier rail-to-rail single-ended output voltage. A first P-channel input section sources a first...
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5334949 |
Differential amplifiers
A differential amplifier is disclosed which consists of two constant current sources I 1 , I 2 , one end of each of which is connected to a power supply terminal 4, a pair of differential...
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5327100 |
Negative slew rate enhancement circuit for an operational amplifier
An operational amplifier enhances its negative slew rate by providing more base current to a bottom PNP output drive transistor. A large signal applied at the inverting input of the operational...
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5319267 |
Frequency doubling and mixing circuit
Disclosed is a frequency doubling and mixing circuit capable of effecting frequency doubling operation and mixing operation with one unit of circuit. It includes a first set of differential...
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5317279 |
Linear voltage to current converter including feedback network
A voltage to current converter includes three field effect transistors (FETs), the sources of which are electrically connected to define a common source node, and a feedback network. First and...
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5315264 |
Rail-to-rail opamp with large sourcing current and small quiescent current
A rail-to-rail CMOS operational amplifier with a large source current and small quiescent current. The CMOS opamp includes a folded cascode input structure, a negative slew detector and an output...
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5311144 |
Ultra-fast differential amplifier
In a high gain differential amplifier, in order to obtain a high gain-band product, this amplifier is provided with a controlled feedback in current. In each of the channels of the amplifier, a...
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5307023 |
Non-linear operational transconductance amplifier
A non-linear current mirror amplifier includes a master diode-connected transistor in series with a resistor to provide a forward diode bias and a resistive drop. A slave transistor is forward...
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5304869 |
BiCMOS digital amplifier
A BiCMOS circuit for amplifying the difference voltage between two input voltage signals. The BiCMOS circuit of the present invention includes two bipolar junction transistor which receive the two...
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5294892 |
Two-stage rail-to-rail class AB operational amplifier
An operational amplifier having a differential signal input and an output has an input stage comprising a differential amplifier having a differential signal input and a differential signal output....
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5294893 |
Differential output amplifier input stage with rail-to-rail common mode input range
An amplifier having a rail-to-rail common mode input range that can be used in low voltage power supply applications includes differential input and output stages, the output stage having first and...
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5293136 |
Two-stage rail-to-rail operational amplifier
A two-stage class-AB operational amplifier, that can be implemented either with bipolar or MOS transistors, includes a differential input circuit adapted to receive a differential input signal to...
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5291149 |
Operational amplifier
An operational amplifier includes differential amplification circuitry and current mirror circuitry. The differential amplification circuitry includes first and second differential amplification...
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5287071 |
Amplifier with high common mode rejection
A differential amplifier embodying the invention includes a differential stage whose total output current is sensed and whose tail and output current is maintained relatively constant over a large...
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5276405 |
Integrated instrumentation amplifier for below-ground inputs
An amplifier having a high input dynamic range as well as high CMRR and PSRR values and input impedance while using a single supply voltage, includes an input stage with two transistors which are...
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5276369 |
Sense amplifier circuit having a bias current control means
A sense amplifier circuit characterized by comprising differential amplifying means for amplifying and outputting supplied differential input signals, and bias current control means, connected...
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5266852 |
Filter circuit for integrated circuit
Transistors Q11 and Q12 constitute a first differential amplifier, their emitters are connected with each other by a resistor R1 and also connected respectively to constant-current sources CS11 and...
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5260672 |
Voltage follower circuit
A voltage follower circuit comprising an input (10) for applying an input voltage and an output (20) for emitting an output voltage dependent on the input voltage includes a first current mirror...
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5229658 |
Switching circuit
A level conversion circuit having a plurality of switching elements connected in series or in parallel to a part thereof and having inputted a plurality of complementary signals to the plurality of...
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5220289 |
Differential amplifier circuit
A differential amplifier circuit includes a differential amplifier unit powered by a power source voltage and supplied with a drive current for producing a differential output. A current source...
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5220288 |
Continuous-time differential amplifier with low offset voltage
A continuous-time differential amplifier (52, 100) preserves fast settling time while reducing a relatively-high offset voltage-normally associated with a continuous-time differential amplifier...
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5218319 |
Differential amplifier and active filter using the same
A differential amplifier comprises a pair of current mirror circuits, a pair of constant current supplies and a pair of differential amplifier circuits. The first differential amplifier circuit is...
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5212458 |
Current mirror compensation circuit
A current mirror compensation circuit is disclosed herein which automatically adjusts the operating conditions of a current mirror so as to compensate for the voltage dependent current...
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5212456 |
Wide-dynamic-range amplifier with a charge-pump load and energizing circuit
An amplifier has a first stage employing a pair of differentially connected NMOS amplifier transistors, a second stage composed of a bipolar current mirror circuit and two charge pumps. Each charge...
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5212455 |
Differential output, power, CMOS, operational amplifier
A power CMOS operational amplifier with a differential output, having an intrinsically stable current absorption under rest conditions, comprises two symmetric branches, each comprising a first...
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5208552 |
Rail to rail operational transconductance amplifier
A transconductance amplifier comprises two complementary differential amplifiers at the input (T1a,T2a; T1b,T2b), the quiescent currents of which are fixed by two current sources (Ia, Ib),...
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5204638 |
Intrinsic offset recovery circuit particularly for amplifiers
Intrinsic offset recovery circuit particularly for amplifiers, which comprises an input differential amplifier constituted by a first PNP transistor, by a second PNP transistor, by a third NPN...
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5202645 |
Stabilized transient response of a cascode CMOS amplifier
Operational amplifiers are often used in unity gain configurations where the output is fed back to the input. In the noninverting buffer configuration the output is directly connected to the...
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5200710 |
Current mirror amplifier circuit and method of driving the same
A current mirror amplifier circuit includes a differential amplifier circuit having first and second nodes for differentially amplifying a pair of complementary input signals in an activation mode....
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5198781 |
Custom integrated circuit composed of a combination of analog circuit cells designed to operate in current mode
A circuit constituting a system or a subsystem is composed of a cascade connection of a plurality of analog circuit cells. At least one of said analog circuit cells has either the current-sink...
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5184086 |
Differential amplifier
A differential amplifier comprises: first and second transistors the emitters of which are connected to each other through a resistance element; a third transistor to the emitter of which a current...
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5182525 |
CMOS transconductance amplifier with floating operating point
A CMOS transconductance amplifier with a floating operating point which has low quiescent-current consumption for a voltage-to-current converter. On the other hand, the current yield of the output...
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5177450 |
CMOS power amplifier
A CMOS power amplifier is disclosed having a differential input amplifying stage for amplifying differential input signals, a high-gain amplifying stage, and an output stage. The high-gain...
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5168244 |
Electric circuit fabricated from magneto-resistive elements and active circuit elements
A differential amplifier circuit comprises a current mirror circuit associated with an electric power source, and an amplifier circuit for developing differential voltage produced between a pair of...
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5168243 |
Integrated high gain amplifier
An integrated high gain amplifier in which voltage at the high impedance output node is sensed by sensing voltage excursions which are proportional to the output voltage at another point in the...
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5166637 |
Distortion cancellation amplifier system
A distortion cancellation amplifier system operational amplifier system includes a current mirror circuit having an input, an output and a common terminal; a device for providing a pair of...
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5162751 |
Amplifier arrangement
An amplifier circuit includes a driver stage made up of a differential pair and which is coupled to an output stage consisting of a first output transistor and a second output transistor having a...
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5157350 |
Analog multipliers
Class A gain control systems having extremely good linearity and wide dynamic range, and suitable for monolithic integration, are described in embodiments realizing several classical multiplier...
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5157322 |
PNP transistor base drive compensation circuit
In an integrated circuit a PNP current mirror can lose its current reflection accuracy when low Beta transistors are involved. Since the conventional PNP transistors can often have low Beta this...
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5153529 |
Rail-to-rail input stage of an operational amplifier
An input stage of an operational amplifier uses current sources to allow first and second differential input transistor pairs to operate near the power supply rails. The output stage of the...
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5153500 |
Constant-voltage generation circuit
The circuit-voltage generation circuit according to the present invention incorporates a reference voltage generation circuit employing a first and a second transistors which output a first and a...
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5146188 |
Constant current circuit and an oscillating circuit controlled by the same
A constant current circuit having an output current I 2 which changes with the change of the power source voltage V cc , and an oscillating circuit whose oscillation frequency is made variable by...
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5144169 |
Operational amplifier circuit
An operational amplifier circuit comprises a pair of emitter common transistors forming a differential amplifier circuit including a first conductivity type first and second transistors; a current...
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