|
Match
|
Document |
Document Title |
|
|
7619476 |
Biasing stage for an amplifier
An amplifier biasing stage includes a transistor that provides a biasing signal for a complementary pair of field-effect transistors included in an output stage of an amplifier. The amplifier...
|
|
|
7583145 |
Hybrid output stage apparatus and related method thereof
The present invention discloses an apparatus for generating an output signal according to an input signal, including a signal generating circuit for generating a first and a second control signal...
|
|
|
7576613 |
Regulated cascode circuits and CMOS analog circuits including the same
A regulated cascode circuit includes a first MOS transistor of a first conductive type, a second MOS transistor of the first conductive type, a third MOS transistor of a second conductive type, a...
|
|
|
7567628 |
Symmetric differential slicer
A self-biasing slicer includes a self-biased differential transistor pair. As a result of the self-biasing, the slicer may receive input signals without the use of AC coupling. That is, a...
|
|
|
7535300 |
Operational amplifier
An operational amplifier and use of an operational amplifier is provided that includes an input differential amplifier, which is connected to a first input and to a second input and a differential...
|
|
|
7508249 |
Distributed transistor structure for high linearity active CATV power splitter
A transistor cell includes a first stage comprising a first transistor that is coupled to a RC filter arrangement. A second stage has a second transistor that is coupled to the first stage. The...
|
|
|
7474153 |
Dual stage source/sink amplifier circuit with quiescent current determination
An amplifier circuit includes a first stage that receives a signal input and a control input and that generates first stage outputs. A second stage that communicates with the first stage and the...
|
|
|
7471151 |
Circuits for quiescent current control
A circuit capable of quiescent current control, the circuit comprising a first operational transconductance amplifier (OTA) including a first output terminal, a first transistor including a first...
|
|
|
7466201 |
Class AB output stage and method for providing wide supply voltage range
A class AB output stage includes first (M P ) and a second (M N ) output transistors having sources coupled to first (V DD ) and second reference voltages, respectively, drains coupled to an output...
|
|
|
7449952 |
Amplifying circuit having a pull-up circuit and a pull-down circuit for increasing slew rate
An amplifying circuit includes an operational amplifier, a pull-up circuit and a pull-down circuit. The operational amplifier generates a first pull-up signal, a first pull-down signal and an...
|
|
|
7411455 |
High output current buffer
A bipolar high output current buffer is disclosed using a negative feedback current mirror to supply the base drive to an output transistor. Small quiescent currents are used wherein the buffer...
|
|
|
7405624 |
Class AB source follower
Various source follower circuits and methods for implementing such are disclosed. As one example, a class AB source follower circuit is disclosed that includes a source follower circuit that is...
|
|
|
7368992 |
Load-invariant amplifier
A push-pull amplifier having low output impedance and low crossover distortion is provided. A least one of a current through a sourcing current path of an output stage and a current through a...
|
|
|
7362175 |
Low-consumption voltage amplifier
A low consumption voltage amplifier including a transistor, a first current generator that supplies power to the drain of the transistor, a second current generator that charges the source of the...
|
|
|
7352243 |
Voltage comparator circuit
A voltage comparator that realizes high-speed operation with a simple structure includes an input differential stage having a first differential pair and a second differential pair, into which a...
|
|
|
7327194 |
Low voltage low power class A/B output stage
A CMOS class A/B output stage provides the advantages of high speed operation, low supply voltage requirements, and low quiescent current draw, resulting from the use of subthreshold biasing of the...
|
|
|
7304538 |
Accurate quiescent current control scheme in floating controlled class AB amplifier
Provided is an amplifier including a system for controlling output stage quiescent current. The amplifier includes a driving stage including first pmos and nmos transistors coupled together, and an...
|
|
|
7301399 |
Class AB CMOS output circuit equipped with CMOS circuit operating by predetermined operating current
In a class AB CMOS output circuit provided with a CMOS circuit including first P and N channel transistors and operating by a predetermined operating current I o , a replica circuit is formed on a...
|
|
|
7271630 |
Push-pull buffer amplifier and source driver
A push-pull buffer amplifier and a source driver are provided. In the buffer amplifier, the N-type and the P-type comparators compare an input signal and an output signal. The input terminals of...
|
|
|
7256651 |
System and method for providing a constant swing high-gain complementary differential limiting amplifier
A system and a method are disclosed for providing a constant swing high-gain complementary differential limiting amplifier. High gain for the differential amplifier is created by providing a...
|
|
|
7242250 |
Power amplifier
A power amplifier includes an input circuit, three power supply lines with voltages successively decreasing in an order of first, second and third power supply lines, a push-side driving circuit...
|
|
|
7224232 |
RF power amplifier and method for packaging the same
A method and apparatus is provided for use in power amplifiers for reducing the peak voltage that transistors are subjected to. A power amplifier is provided with first and second switching devices...
|
|
|
7190225 |
Efficient low EMI switching output stages and methods
Efficient low EMI switching output stages and methods that may be used, by way of example, in class D amplifiers. The output stages comprise class AB output stages having complementary FETs for the...
|
|
|
7151410 |
Class AB enhanced transconductance source follower
A low voltage, high bandwidth, enhanced transconductance, source follower circuit constructed from MOS FET devices, which operates in a class AB mode. The drain current of the source follower is...
|
|
|
7145393 |
Operational amplifier with class-AB+B output stage
An operational amplifier is provided that includes a Class-AB stage and a Class-B stage coupled in parallel with each other to form an output stage. The Class-AB stage is operable to drive an...
|
|
|
7078970 |
CMOS class AB operational amplifier
A CMOS operational amplifier with a Class AB output stage has an output terminal and an input stage driving the output stage. The Class AB output stage includes a pair of p-channel and n-channel...
|
|
|
7075370 |
CMOS-configured transconductance amplifier circuit
A CMOS-implemented transconductance amplifier has an input gain stage coupled to a CMOS output stage. The inverting input of the input gain stage is coupled to an input/output port to which an...
|
|
|
7061989 |
Fully digital transmitter including a digital band-pass sigma-delta modulator
A digital transmitter ( 20 ) that may be advantageously used in a high-frequency transceiver, such as a wireless telephone handset, is disclosed. The transmitter ( 20 ) includes digital upconverter...
|
|
|
7057459 |
Semiconductor integrated circuit
A semiconductor integrated circuit includes first and second differential amplification devices to amplify a voltage difference of input signals inputted from a positive input terminal and a...
|
|
|
6982601 |
High isolation/high speed buffer amplifier
A method and circuits of a high isolation and high-speed buffer amplifier capable to handle frequencies in the GHz range have been achieved. The output to input isolation is primary dependent on...
|
|
|
6970044 |
Audio signal amplifier circuit and electronic apparatus having the same
The present invention is provided with a first, a second and a third differential amplifier which operate at a source voltage with respect to a reference voltage or a voltage between these; an...
|
|
|
6946987 |
Common operational amplifier and gain circuit and A/D converter using thereof
A common operational amplifier for a pipeline circuit is provided. The common operational amplifier is used by the stage circuits of the pipeline circuit by turns according to a predetermined...
|
|
|
6940353 |
High frequency power amplifier
A CMOS amplifier includes a CMOS inverter and a bias circuit coupled in a feedback loop between the output and input of the inverter. The bias circuit provides linear biasing so that the inverter...
|
|
|
6933784 |
Output stage for high gain and low distortion operational amplifier
A class-AB MOS output stage that provides higher gain and significantly lower distortion. The class-AB MOS output stage includes a PMOS output transistor and an NMOS output transistor coupled...
|
|
|
6930551 |
Zero voltage class AB minimal delay output stage and method
A class AB output circuit includes a P-channel pullup transistor (M 13 ) having a source coupled to a supply voltage, a drain coupled to an output( 10 ), a gate coupled to respond to an input...
|
|
|
6922105 |
Operational amplifier
In an operational amplifier, a differential amplifying circuit is configured to amplify an input voltage inputted from the input terminal. An outputting transistor is connected to the output...
|
|
|
6911866 |
Method and device for switch-on current limiting in push-pull amplifying power stages
The invention provides a method for amplification of analog push-pull signals ( 101 a, 101 b ) by means of a push-pull amplifier output stage ( 100 ) which has a first output stage transistor (...
|
|
|
6909327 |
Amplifier
An amplifier has a p-type and an n-type difference transistor pairs providing respective outputs, and is adapted to provide the outputs of the pairs in an integrated form. When the level of the...
|
|
|
6885240 |
Amplifying circuit with variable load drivability
The present invention relates to an amplifying circuit that can change load drivability responding to load conditions, and reduce power consumption. The amplifying circuit according to the present...
|
|
|
6867621 |
Class AB digital to analog converter/line driver
A differential line driver includes first, second, third and fourth cascode transistors connected in parallel, wherein drains of the first and third transistors are connected to a negative output...
|
|
|
6859100 |
Class-A amplifier circuit having output voltage varied according to input voltage
A class-A amplifier circuit having output voltage varied according to input voltage includes a class-A amplifier, a voltage pull-up switch level circuit, an output voltage of the class-A amplifier,...
|
|
|
6836186 |
AB class amplifier for controlling quiescent current
An AB class buffer amplifier controls quiescent current. The AB class buffer amplifier includes a first current controller and a second current controller. The first current controller sources...
|
|
|
6828857 |
High gain, high bandwidth CMOS transimpedance amplifier
A three-stage transimpedance amplifier, where the first stage is a shunt-shunt feedback amplifier, the second stage is a simple voltage amplifier, and the third stage is a shunt-shunt feedback...
|
|
|
6794942 |
Electrical circuits
A power amplifier has a pair of FETs of opposite kinds connected together to form a source/drain circuit connected with an output. A second pair of high speed transistors is connected to the input...
|
|
|
6788147 |
Operational amplifier with class-AB&plus B output stage
An amplifier comprising: 1) a class-AB push-pull stage comprising a first P-channel output transistor and a first N-channel output transistor for driving an output load; and 2) a class-B current...
|
|
|
6784739 |
Class AB amplifier circuit
A class AB amplifier circuit includes a complementary output stage and a biasing circuit for biasing the output stage. The complementary output stage includes a P-type MOS transistor and an N-type...
|
|
|
6737924 |
Differential, double feedback CMOS transimpedance amplifier with noise tolerance
A transimpedance amplifier having a first input port to connect to a signal source having an output impedance, and a second input port loaded by an impedance matched to the output impedance of the...
|
|
|
6727758 |
Fast cascaded class AB bipolar output stage
A set of class AB output stages are cascaded to provide a class AB device circuit which utilizes relatively small transistors, low power, and virtually eliminates crossover distortion. The input...
|
|
|
6717470 |
Voltage amplifier with output stages having high capacitive load tolerance
A voltage amplifier circuit inhibits excessive output phase shifts from a voltage amplifier that could result in oscillation, while still providing for rail-to-rail outputs. A first output stage...
|
|
|
6703900 |
Fast, stable overload recovery circuit and method
A differential amplifier includes an input stage ( 13 ) and an output stage ( 100 ) including an output transistor (M 11 ) having a source coupled to a supply voltage (V DD ), a gate coupled to a...
|