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7414481 |
Receiver with colpitts differential oscillator, colpitts quadrature oscillator, and common-gate low noise amplifier
Embodiments of the present invention include a common-gate amplifier having an input terminal and an output terminal, a transistor having a source, a drain, and a gate, four inductors, and two...
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7414475 |
Linearity-improved differential amplification circuit
A linearity-improved differential amplification circuit is provided, A linearity-improved differential amplification circuit comprises a main differential amplification unit differentially...
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7414472 |
Differential amplifying circuit
Disclosed is a differential amplifying circuit including an amplifying circuit, wherein 1) a drain of a sixth transistor is connected to a drain of an eighth transistor, and a drain of a tenth...
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7414441 |
Output buffer circuit
An output buffer circuit includes an input stage of which one end receives an input voltage and the other end receives an output voltage; a class AB output stage that increases a current flowing in...
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7411452 |
Low DC power rail-to-rail buffer amplifier for liquid crystal display application
A low DC power rail-to-rail buffer amplifier is suitable for liquid crystal display application. The buffer amplifier comprises: a dc bias stage, a pair of complementary differential amplifiers, a...
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7408409 |
Amplifier circuit with cross-coupled cascode transistors
Embodiments of the present invention provide differential pair amplifier circuits including cross-coupled cascode transistors. Other embodiments may be described and claimed.
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7405620 |
Differential amplifier and method
A method of forming a differential amplifier on a substrate which has a greater tolerance for applied voltages and a chip so formed. The differential amplifier circuit on a substrate has additional...
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7403063 |
Apparatus and method for tuning center frequency of a filter
A tuning method and a tuning apparatus for tuning a filter are disclosed. The tuning method includes: configuring the filter as a VCO; utilizing the VCO to generate an oscillation signal according...
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7397306 |
High-bandwidth high-gain amplifier
An amplifier circuit includes a first transistor having a control terminal that receives a first amplifier input, a first terminal, and a second terminal. A second transistor includes a control...
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7394872 |
Data receiver and method for receiving data using folded differential voltage sampler
A data receiver that is capable of precisely detecting data at high speed even at a high frequency after receiving differential reference signals and data in synchronization with a clock signal,...
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7394310 |
System and method for programmable switching characteristics of an analog switch in a transconductance amplifier
Provided are a method and system for controlling impedance in a transconductance amplifier. A system includes a first transconductance amplifier and a second transconductance amplifier configured...
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7391263 |
Operational amplifier
An operational amplifier 1 is provided with differential amplifier 2 , replica amplifier 3 , voltage-current converting circuit 4 , reference current source 5 and comparator 6 ....
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7391262 |
Circuit and method for driving bulk capacitance of amplifier input transistors
Amplifier circuitry includes an input stage having a transconductance stage including first and second input transistors and a first tail current source, gates of the first and second input...
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7391260 |
Variable gain amplifier and variable gain amplifier module
An analog variable gain amplifier (VGA) adjusting a signal level of a mobile communication system is provided. More particularly, design of a VGA using an operational transconductance amplifier...
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7383373 |
Deriving corresponding signals
Apparatus used in deriving corresponding signals includes first and second circuitry. The first circuitry derives, from a source-terminated first signal driven from a Peripheral Control Interface...
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7382189 |
Multi-gain amplifier with input impedance control
In one embodiment, an amplifier circuit has at least one branch and current-source circuitry providing a tail current to the branch, which has at least one load tank, at least one input transistor...
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7378907 |
Selective differential low-noise amplifier
A selective differential low-noise amplifier includes a pair of transistors, each transistor of the pair being connected by its source to a current source and by its gate and/or its source to a...
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7375590 |
Single-ended input to differential-ended output low noise amplifier implemented with cascode and cascade topology
A low noise amplifier has the properties of low noise figure and high gain under a high-frequency operation. The low noise amplifier includes a first transistor, a first inductive impedance, a...
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7372330 |
Variable gain amplifier
A variable gain amplifier of such configuration that can yield continuously and log-linearly variable gains in relation to control voltage and, at the same time, that does not use an attenuator, an...
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7372329 |
Method and apparatus to remove the DC component of a feedback signal
A feedback circuit disposed across input and output terminals of an amplifier is adapted so as not inject DC current back into the input terminal of the amplifier. The feedback circuit includes, in...
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7368990 |
Differential amplifier and data driver employing the differential amplifier
Disclosed is a differential amplifier which includes first and second input terminals, an output terminal, first and second differential pairs, and first and second current sources for supplying...
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7368989 |
High bandwidth apparatus and method for generating differential signals
An apparatus and method for generating differential signals. The apparatus includes a first operational amplifier receiving a first signal, a second operational amplifier receiving a second signal,...
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7368983 |
Operational amplifier and method for canceling offset voltage of operational amplifier
An operational amplifier that cancels offset voltage while enabling its gain to be set to any value. The operational amplifier includes a first switch for short-circuiting the gates of two...
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7365601 |
Amplifier for amplifying a signal
An amplifier for amplifying a signal which is applied to a signal input having a first pair of transistors ( 10 ), which is connected to the signal input and which contains two transistors ( 10 -...
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7362174 |
Current-controlled CMOS (C3MOS) wideband input data amplifier for reduced differential and common-mode reflection
Current-controlled CMOS (C3MOS) wideband input data amplifier for reduced differential and common-mode reflection. Impedance matching and bandwidth extension provides desired gain at higher...
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7362173 |
System and method for providing slew rate enhancement for two stage CMOS amplifiers
A slew rate enhancement circuit is disclosed for increasing a slew rate in a two stage CMOS amplifier. The slew rate enhancement circuit detects an input signal transition in the two stage CMOS...
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7358810 |
Buffer amplifier
A buffer amplifier, which includes a first differential signal amplifier including first and second NMOSFETs (N-type metal-oxide semiconductor field-effect transistors) amplifying differential...
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7358809 |
Method for forming elements with reduced variation
The performance of precision analog integrated electronic circuits is directly related to the degree of matching between electrical circuit elements. Any residual mismatch of circuit elements after...
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7348848 |
Buffer amplifier for source driver
A buffer amplifier for source driver is disclosed. The buffer amplifier has an N-channel differential amplifier and a P-channel differential amplifier as its input stages so as to achieve...
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7345545 |
Enhancement mode transceiver and switched gain amplifier integrated circuit
Methods and apparatus are provided for RF switches ( 504, 612 ) integrated in a monolithic RF transceiver IC ( 500 ) and switched gain amplifier ( 600 ). Multi-gate n-channel enhancement mode FETs...
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7342450 |
Slew rate enhancement circuitry for folded cascode amplifier
A folded-cascode operational amplifier including a differential input stage ( 19 ) and a class AB output stage ( 20 ) includes a first slew boost current mirror ( 13 ) and a second slew boost...
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7342449 |
Differential amplifier, and data driver of display device using the same
Disclosed is a Rail-to-Rail amplifier including a plurality of differential pairs of a first conductivity type and a plurality of differential amplifiers of a second conductivity type each with one...
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7342418 |
Low voltage differential signal receiver
An LVDS receiver of the present invention rapidly restores an LVDS inputted at a high speed into a full swing signal of CMOS or TTL level. A common mode shifter amplifies an LVDS contained in a...
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7339431 |
CMOS amplifiers with frequency compensating capacitors
The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the...
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7339430 |
Rail-to-rail operational amplifier with an enhanced slew rate
A rail-to-rail operational amplifier is provided with a high-side current adjusting circuit and a low-side current adjusting circuit. On a basis of a comparison between a first input voltage and a...
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7339429 |
Adjusting methods of arithmetic multiplying circuit, drive circuit, and phase margin
An arithmetic amplifying circuit for driving a capacitive load is provided including a voltage follower circuit converting an input signal to impedance, and a resistance circuit which is serially...
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7339422 |
Amplifier circuit and display device
Offset canceling amplifier circuit in which a high accuracy of output with a suppressed output offset is achieved and a variation in a slew rate is also suppressed, and a display device having the...
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7332965 |
Gate leakage insensitive current mirror circuit
A gate leakage insensitive current mirror circuit including an input stage, an output stage, and a pair of complementary source followers. The pair of complementary source followers is connected...
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7327166 |
Reference buffer with improved drift
A reference voltage circuit having an open-loop buffer driven by a matching buffer included within a closed-loop, generates a stable differential or single-ended voltage while minimizing...
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7323935 |
Transconductance amplifier having common mode feedback circuit and method of operating the transconductance amplifier
A complementary transconductance amplifier having a common mode feedback circuit includes a first-type transconductor, a second-type transconductor and a common mode feedback circuit. The...
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7323934 |
Operational transconductance amplifier
An operational transconductance amplifier (OTA) includes a first, a second and a third differential units, a voltage-to-current converting unit and a current subtraction device. The first and the...
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7323932 |
Silicon-on-insulator differential amplifier circuit
A differential amplifier formed on a silicon-on-insulator substrate, including means to prevent the bodies of its differential input transistors from charging to unwanted potentials in the standby...
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7321259 |
Programmable logic enabled dynamic offset cancellation
Techniques and circuitry are provided for programmatically controlling signal offsets in integrated circuitry. In one embodiment, a buffer circuit having an offset cancellation circuit receives a...
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7317356 |
Ultra low-frequency response, DC-blocked low-noise amplifier
An amplifier circuit is disclosed that allows for practical integrated circuit implementation of a dc-blocked, low-noise differential amplifier capable of amplifying ultra low-frequency signals and...
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7315210 |
Differential operational amplifier
The input stage of an operational amplifier includes at least four signal-receiving stages adapted to receive four primary input signals. If the voltage level associated with any of the input...
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7312662 |
Cascode gain boosting system and method for a transmitter
A communication device includes a first polarity driver circuit. The first polarity driver circuit includes a first current source. The first polarity driver circuit includes a first amplifier. The...
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7312660 |
Differential amplifier and active load for the same
The differential amplifier and an active load are provided. The differential amplifier includes a differential input section which is configured to generate a differential current according to a...
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7312659 |
Multi-amplifier circuit
An amplifier circuit includes first, second, third and fourth transconductance amplifiers that each have an input, an output and a transconductance gain. The outputs of the first, second and third...
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7312658 |
Differential amplifier with two outputs and a single input of improved linearity
A differential amplifier having a first and second output terminals and receiving an input signal at an input terminal. The amplifier comprises a first amplifier having a first input connected to...
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7312598 |
Capacitor free low drop out regulator
A low drop out (LDO) regulator that includes a novel error amplifier, which is arranged with a first stage that employs both NMOS and PMOS devices that are similarly doped in differential pairs and...
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