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6064262 |
CMOS differential amplifier having offset voltage cancellation and common-mode voltage control
A differential amplifier for amplifying the difference between first and second input signals and producing therefrom a differential output signal. The differential amplifier includes first and...
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6064263 |
DTCMOS differential amplifier
An amplifier is constructed having a FET formed in a substrate with its gate coupled to a first voltage terminal. A second FET formed in the substrate is coupled both to the first FET and to a...
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6057734 |
Symmetrical analog power amplifier
A symmetrical analog power amplifier employing CMOS technology comprising an input stage and an improved output stage having a pull up/down arrangement to provide improved operating...
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6052025 |
CMOS operational amplifiers having reduced power consumption requirements and improved phase margin characteristics
Operational amplifier integrated circuits include a differential input stage, a cascode current mirror, a cascode current source and a preferred bias signal generator which is responsive to a clock...
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6049246 |
Amplifier offset cancellation using current copier
A differential amplifier circuit achieves offset cancellation by supplying an offset correction current from a current copier circuit to the output of the differential amplifier. The current copier...
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6049253 |
Operational amplifier
Both the distortion characteristic and the through rate characteristic of an operational amplifier are excellently retained over a wide range of a supply voltage. While an operating current of a...
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6049229 |
Self-biasing CMOS PECL receiver with wide common-mode range and multi-level-transmit to binary decoder
A pseudo-emitter-coupled-logic (PECL) receiver has a wide common-mode range. Two current-mirror CMOS differential amplifiers are used. One amplifier has n-channel differential transistors and a...
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6046638 |
Receive amplifier for reception of high-speed data signals
A receive amplifier for high-speed data has a differential input stage with a very wide common-mode rejection range and low offset voltage. This input stage interfaces the differential data signals...
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6043708 |
Fully complementary folded cascode amplifier
A method and apparatus for decreasing the supply current to peak output current ratio of a fully complementary cascode amplifier. The amplifier has two shunt portions coupled to a pair of...
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6043709 |
Transconductor for processing a very high frequency signal
The present invention provides a transconductor for allowing a user to adjust the transconductance of the transconductor having wide linear input range and large output resistance and the...
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6040743 |
Voltage controlled oscillator for recovering data pulses from a data input stream having digital data with an unknown phase
A voltage controlled oscillator (VCO), for use in a phase locked loop for clock multiplication, for example in recovery of data pulses from a data stream input comprising digital data with unknown...
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6034568 |
Broadband dc amplifier technique with very low offset voltage
An operational amplifier with two differential input stages is used to separately achieve low offset voltage and broad bandwidth characteristics. One input stage addresses dc and low frequency...
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6034567 |
Semiconductor integrated circuit device provided with a differential amplifier
A differential amplifier comprises an n-channel MOS transistor to the gate of which an input voltage VIN1 is fed, and an n-channel MOS transistor to the gate of which an input voltage VIN2 is fed....
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6031423 |
Input stage for rail-to-rail input op amp
Methods and apparatus for providing a rail-to-rail op amp are disclosed. The rail-to-rail op amp includes a P-channel input stage and an N-channel input stage. The P-channel input stage includes a...
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6028480 |
Amplifier with active-bootstrapped gain-enhancement technique
In a differential pair (P1, P2) actively loaded with a current mirror (N1, N2), a differential amplifier (A) drives the common terminal (Z) of the current mirror to force a zero voltage difference...
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6028479 |
Low voltage transmission line driver
A high-speed low-voltage line-driver circuit implemented using various embodiments of high speed current-feedback opamps is disclosed. The line driver of the present invention uses a fully...
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6025742 |
Low voltage differential swing driver circuit
A low voltage differential swing driver circuit comprises first and second serially connected field effect transistors connected in series through first and second resistors. Third and fourth field...
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6018267 |
High output swing operational amplifier using low voltage devices
A power efficient high output swing operational ("HOOP") amplifier for integrated circuit analog signal processing is described. The operational amplifier includes a differential input stage and an...
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6018269 |
Programmable gain amplifier
A method for producing gain in an electrical signal includes providing a variable resistance system having a plurality of transistors connected in parallel and controlling the resistance of the...
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6018268 |
High speed and high gain operational amplifier
The present invention relates to the design of high speed and high gain operational amplifiers for use in for example high performance switched-capacitor analog circuits. Increasing the gain...
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6016078 |
Low offset output stage for precision comparators
A MOS integrated multistage differential single ended amplifier circuit includes an input circuit generating two differential current outputs, and an output circuit. The output circuit includes a...
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6011436 |
Voltage conversion circuit and differential difference amplifier
Two pairs of differential input voltages are converted into two pairs of differential voltages through voltage converters whose output voltages are determined only by the input voltage amplitudes....
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6008695 |
Input amplifier for input signals with steep edges
An input amplifier for input signals with steep edges has a MOS transistor, whose source or drain is connected to a node connected to an output stage. The output signal is fed back into the...
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6005440 |
Operational amplifier
An operational amplifier capable of supplying a large power approximate to a power supply voltage to a load resistance and of rendering the current consumption relative to the power supply voltage...
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6005439 |
Unity gain signal amplifier
A unity gain analog signal amplifier for low voltage applications, with no DC level shifting so as to preserve dynamic range, a large bandwidth, a good driving capability for capacitive loads and a...
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6005438 |
Output high voltage clamped circuit for low voltage differential swing applications in the case of overload
A low voltage differential swing circuit includes a clamping circuit to prevent the output high voltage from exceeding a reference voltage. The low voltage differential swing circuit also includes...
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6002276 |
Stable output bias current circuitry and method for low-impedance CMOS output stage
A CMOS output circuit including a differential error amplifier (3) is operated to provide a stable quiescent bias current in an output MOSFET by causing a first current equal to a threshold voltage...
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5999055 |
Tunable CMOS Operational Transconductance Amplifier
A tunable CMOS OTA is provided, which improves the transconductance linearity with a simple circuit configuration. This OTA is comprised of (a) a differential input pair of first and second...
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5999052 |
High speed, fine-resolution gain programmable amplifier
An integrated circuit differential amplifier with a digitally controllable gain. In a preferred embodiment, the differential amplifier employs first and second transconductance (gm) amplifiers and...
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5994960 |
High speed switched op-amp for low supply voltage applications
In a switched operational amplifier including a differential input stage and at least a second output stage, the compensation capacitor commonly required to couple the output node of the second...
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5990741 |
Variable gain amplifier
A variable gain amplifier is disclosed, comprising a pair of differential MOS transistors M1 and M2 and a current mirror. The sources of the differential MOS transistors M1 and M2 are connected to...
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5973537 |
Common mode control circuit for a switchable fully differential Op-AMP
In switch-capacitor systems for extremely low supply voltage, employing a fully differential switched op-amp, proper functioning of nMOS switches coupled to the inverting input node of an...
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5969573 |
Amplifier circuit with small offset voltage influence
An amplifier circuit influenced less by an offset voltage and capable of permitting an as broad as possible dynamic range is provided. This amplifier circuit includes first and second MOS...
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5963097 |
Low-noise amplifier
A low-noise amplifier is disclosed that is capable of amplifying a signal with high gain (e.g., >60 dB) and low noise (e.g., <2 nV/Hz -1 /2) over a large frequency bandwidth (e.g., from 1 Hz...
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5959492 |
High speed differential driver circuitry and methods for implementing the same
An integrated circuit driver drives a differential signal over a communication cable, such as a twisted-pair cable. The integrated circuit driver includes a differential pre-driver that receives an...
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5959475 |
Complementary push-pull CMOS source follower analog video buffer
An analog video buffer utilizes a complementary push-pull CMOS source follower video buffer with a feedback driver. The CMOS source follower provides a low impedance output node with high driving...
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5949284 |
CMOS buffer amplifier
A CMOS buffer amplifier can accept input signals and produce output signals that are within one half of the enhancement threshold voltage of the power supply voltages. These characteristics make...
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5942940 |
Low voltage CMOS differential amplifier
A CMOS differential amplifier uses a first pair of complementary MOSFETs and a second pair of complementary MOSFETs coupled to a power supply (by another pair of MOSFETs) in such a manner as to be...
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5939943 |
Amplifier with improved output voltage swing
An amplifier comprising an amplifier stage having an input terminal (1) for receiving an input signal; an output terminal (2) for supplying an output signal; an amplifier transistor (4); and a load...
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5939942 |
High frequency input buffer
A high frequency input buffer within an integrated circuit that is used to receive a signal from another integrated circuit is described. A preamplifier for use in an input buffer of the integrated...
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5936466 |
Differential operational transconductance amplifier
A low-power dual-g m differential operational transconductance amplifier (OTA) having a differential input for improved common-mode noise rejection, a high transconductance for power savings, and...
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5936469 |
Amplifier with input referred common-mode adjustment
A circuit and method control the common-mode potential at an output (17, 18) of a fully differential amplifier (32) by feeding forward a common-mode correction signal through the amplifier. An...
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5933056 |
Single pole current mode common-mode feedback circuit
A CMFB circuit that contains only one voltage amplifier in the loop, and is therefore immune to multi-pole stability problems. This is accomplished by providing feedback in the form of current...
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5929705 |
CMOS rail-to-rail input/output amplifier
A CMOS rail-to-rail input/output operational amplifier has constant supply current with respect to the input signal's common mode voltage. By use of current bleeders, i.e. a smaller transistor of...
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5930302 |
Balanced phase data bus transmitter
A transmitter for a differential serial data communication bus incorporating the CAN format includes features for minimizing radiated emissions. The transmitter includes a second order input filter...
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5917378 |
Rail-to-rail type of operational amplifier with a low offset voltage achieved by mixed compensation
A rail-to-rail type of operational amplifier is provided, which has a low offset voltage and improved bandwidth, slew rate, and phase margin. This operational amplifier includes two level-shifting...
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5913181 |
Circuit for providing a switch signal to trigger changer in a digital potentiometer
A comparator which for example can be used for a digital potentiometer is shown. Specifically, a dual differential input circuit with a push/pull amplifier at the output stage is disclosed wherein...
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5909136 |
Quarter-square multiplier based on the dynamic bias current technique
A four-quadrant multiplier which is constructed from two squaring circuits using the quarter-square technique and is suitable for an integrated circuit (IC) or a large-scale integrated circuit...
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5907259 |
Operational amplification circuit capable of driving a high load
An operational amplification circuit having no crossover distortion includes a pair of differential amplification circuits, a pair of level shift circuits, a pair of current source circuits, and an...
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5900780 |
Amplifier circuit for CMOS operational amplifier
An output circuit 1 has a p-type MOS transistor Q1 connected between a power-voltage node and an output node, and an n-type MOS transistor Q2 connected between a ground-voltage node and the output...
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