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9041465 Amplifier circuits  
Differential amplifier circuits for LDMOS-based amplifiers are disclosed. The differential amplifier circuits comprise a high resistivity substrate and separate DC and AC ground connections. Such...
9041466 Multimode differential amplifier biasing system  
Differential power amplifier circuitry includes a differential transistor pair, an input transformer, and biasing circuitry. The base contact of each transistor in the differential transistor pair...
9030258 Operational transconductance amplifier with increased current sinking capability  
An amplifier circuit includes an input terminal and an output terminal. A current sinking transistor includes a first conduction terminal coupled to the output terminal and a second conduction...
9019013 Power amplifier using differential structure  
Provided is a power amplifier which includes: a first transistor and a second transistor each having a first end connected to a first power source supplying a first voltage and to which signals...
9013236 Operational transconductance amplifier  
An operational transconductance amplifier for connection with multiple input voltage sources includes a resistance simulation unit, two current cancellation units, a first differential output...
9000844 Power efficient transconductance amplifier apparatus and systems  
Embodiments and methods herein operate as two-stage voltage controlled current sources (i.e., dynamic current sources) operating in class AB mode. Phase-delayed current injection circuits are...
8994452 Low-noise high efficiency bias generation circuits and method  
A bias generation method or apparatus defined by any one or any practical combination of numerous features that contribute to low noise and/or high efficiency biasing, including: having a charge...
8988173 Differential negative impedance converters and inverters with variable or tunable conversion ratios  
A differential circuit topology that produces a tunable floating negative inductance, negative capacitance, negative resistance/conductance, or a combination of the three. These circuits are...
8975962 Slew-enhanced operational transconductance amplifier  
Embodiments of the invention are generally directed to improving the slew rate of an amplifier as the amplifier charges or discharges a capacitive load. In one embodiment, the amplifier is coupled...
8970302 Operational amplifier with selective input  
An operational amplifier includes a selective differential stage including a first current mirror and a current distribution circuit. First and second legs of the first current mirror are...
8970303 Amplifiers and related biasing methods and devices  
Biasing methods and devices for amplifiers are described. The described methods generate bias voltages proportional to the amplifier output voltage to control stress voltages across transistors...
8970304 Hybrid amplifier  
Exemplary embodiments are directed to systems, devices, and methods for enhancing a telescopic amplifier. An amplifier may include a differential pair of input transistors including at least one...
8970301 Method for low power low noise input bias current compensation  
Low power low noise input bias current compensation for an amplifier input stage is provided by recycling the tail current of the differential pair transistors. A local amplifier regulates the...
8963638 Operational amplifier circuit  
An operational amplifier circuit includes an output stage circuit. The output stage circuit includes a first and a second output transistors, a capacitor unit, and a switch unit. A drain of the...
8963641 Source-series terminated differential line driver circuit  
A differential amplifier circuit that includes a negative resistor in parallel to synthesize a larger source resistance is disclosed. In one or more implementations, a differential amplifier...
8963640 Amplifier for output buffer and signal processing apparatus using the same  
An amplifier for an output buffer includes an operational amplifier including a first input terminal, a second input terminal, and an output terminal, the operational amplifier is configured to...
8941440 Differential circuit compensating gain enhancement due to self heating of transistors  
A differential circuit with a function to compensate the gain enhancement due to the self-heating of the transistor is disclosed. The differential circuit includes an equalizer unit coupled with...
8933754 Linear differential amplifier with high input impedance  
A differential amplifier provides an amplifier circuit including two differential pairs. A first differential pair is connected in series to a second differential pair. The second differential...
8928407 Current conveyor circuit and method  
A system includes a first variable gain amplifier configured to receive an input signal and a first down-mixer coupled to the first variable gain amplifier. Also, the system includes a first...
8912849 Adaptive operational amplifier bias current  
An operation amplifier (op amp) having a bias current detection circuit that monitors the bias current flowing in an output stage of the op amp. When the bias current detection circuit detects...
8912825 Sense amplifier system and sensing method thereof  
A sense amplifier system and sensing method thereof are provided. The proposed sense amplifier system includes plural sense amplifiers, each of which includes a first switch having a first...
8896379 Error amplifier having cascode current source using body biasing  
Provided is an error amplifier. The error amplifier includes: an amplifying unit receiving first and second input signals and amplifying a voltage difference between the received first and second...
8890614 Operational amplifier module and method for increasing slew rate of operational amplifier circuit  
An operational amplifier module including an operational amplifier circuit, a rate-increasing circuit and an overdriving circuit is provided. The operational amplifier switches an input voltage to...
8872588 Amplifier  
An amplifier comprising at least one amplifying element (20a, 25a) and a biasing circuit (32a, 32b) for biasing the or each amplifying element with a bias voltage is disclosed. The biasing circuit...
8866554 Translinear slew boost circuit for operational amplifier  
A method of improving the slew rate of an amplifier is described where a differential pair of transistors receives a differential first control signal and second control signal. The tail current...
8854135 Operational amplifier with elimination of offset voltage  
An operational amplifier may include a differential stage comprising two transistors whose gates are respectively linked to the two inputs of the operational amplifier. The sources of the two...
8836428 Operational amplifier having low power consumption  
The present invention relates to an operational amplifier having low power consumption, which comprises a differential circuit, an output-stage circuit, and a floating bias generating circuit. The...
8829996 High voltage MOS input stage  
A differential input stage including two input branches each with a pair of transistors. A bias circuit supplies a separate bias current to each of the input branches. A first transistor of each...
8823454 Fully complementary self-biased differential receiver with startup circuit  
In accordance with at least one embodiment, an improved voltage headroom self-biased receiver is provided. In accordance with at least one embodiment, tail current sources are biased so as to be...
8816766 Semiconductor integrated circuit, and reception apparatus and radio communication terminal including semiconductor integrated circuit  
A semiconductor integrated circuit includes: a first capacitance element and a second capacitance element; a first amplification circuit that amplifies a potential difference of a first voltage...
8803602 Common mode bias circuit  
A bias voltage source for a differential circuit has low output impedance at DC, but considerably higher output impedance within the frequency band of the differential signal being processed, to...
8803610 Semiconductor integrated circuit device  
An output signal characteristic of a differential amplifier circuit is improved. When an input data signal becomes ‘Low’, current flowing through a first transistor will decrease and potential at...
8803611 Current mode logic circuit and method  
A circuit includes a bias generating circuit, an operational amplifier, and a current mode logic circuit. The operational amplifier has a first input terminal, a second input terminal, and an...
8791758 Apparatus and methods for buffer linearization  
Apparatus and methods for buffer linearization are provided. In certain implementations, an amplifier includes a buffer circuit and a gain circuit. The buffer circuit includes a buffer transistor...
8787507 Detection and mitigation of interference in a receiver  
A novel receiver architecture optimizes receiver performance in the presence of interference. In various embodiments, power estimation circuits are used with variable selectivity to determine the...
8773202 High performance class AB operational amplifier  
A class AB operational amplifier includes an input stage, an output stage and a level shifter stage to control the quiescent current of the output stage and to transfer the signal from the input...
8766726 Operational amplifier with improved frequency compensation  
An operational amplifier includes an operational amplifier circuit having at least one output node and an output stage coupled to the output node, the output stage containing an output and first...
8749418 Interpolative digital-to-analog converter  
An interpolative digital-to-analog (D/A) converter is adapted to convert a N-bit digital signal into an analog signal, where N is a positive integer greater than 1. The interpolative D/A converter...
8742847 Amplifier and dynamic-bias generation device and dynamic-bias method thereof  
An amplifier, a dynamic-bias generation device of the amplifier and a dynamic-bias method of the amplifier are provided. The dynamic-bias generation device comprises an input stage, an output...
8692616 Operational amplifier, analog arithmetic circuit, and analog to digital converter  
A folded cascode operational amplifier includes a constant current source to output a constant current; a differential input stage to output a part of the constant current as a differential...
8692618 Positive and negative voltage input operational amplifier set  
A positive and negative voltage input operational amplifier includes a positive operational amplifier and a negative operational amplifier. Each of the positive operational amplifier and the...
8686889 Analog frontend for CCD/CIS sensor  
A system for signal processing comprising a cyclic analog to digital converter structure having a first stage and a second stage, wherein the first stage is configured to receive an input signal...
8674767 Body biasing device and operational amplifier thereof  
A body biasing device for an amplifier which has a P-type differential pair and outputs an output signal at an output node according to a differential input signal pair is disclosed. The body...
8674755 Differential source follower having 6dB gain with applications to WiGig baseband filters  
A differential amplifier comprising a first upper device and a first lower device series coupled between two power supplies and a second upper device and a second lower device series coupled...
8665021 Apparatus and methods for amplifier power supply control  
Apparatus and methods for amplifier power supply control are provided. In certain implementations, an amplifier includes an input amplification stage and a power supply control block for...
8659322 Memory having a latching sense amplifier resistant to negative bias temperature instability and method therefor  
An integrated circuit includes a memory cell and a sense amplifier coupled to the memory cell via a first bit line and a second bit line. The sense amplifier includes first and second inverters...
8653892 Systematic intermodulation distortion calibration for a differential LNA  
Systematic IM2 calibration for a differential LNA is disclosed. In an aspect, an apparatus includes an amplifier configured to output an amplified signal having a level of systematic pre-mixer IM2...
8649749 RF receiver with voltage sampling  
A voltage sampling RF receiver in which an impedance control circuit controls the input impedance, by using a mixer stage which generates a feedback voltage, which is coupled to the RF input by a...
8644759 Offset cancellation for DC isolated nodes  
Offset voltages developed on floating nodes on inputs to high-performance amplifiers that are DC isolated from the data signals input to amplifiers are cancelled by connecting a highly resistive...
8633770 Current sense amplifier having bipolar common mode input range  
An amplifier configuration including first and second amplifier inputs and a bias input adapted to receive a common mode signal indicative of a common mode input voltage. First and second...