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7619472 |
Noise-shaped blocker-reject amplifier
A fully differential amplifier that amplifies and filters a signal band of a communications channel, the signal band including a desired signal and at least one blocker signal of an adjacent...
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7616931 |
System and method for reducing phase distortion in a linear transmitter
The invention decreases phase distortion in a transmitter by balancing C load in the power amplifier input such that a PGA won't have phase distortion.
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7609093 |
Comparator with low supply current spike and input offset cancellation
A current control circuit is coupled in parallel with the current paths of a differential comparator circuit to ensure that a substantially constant current is drawn from a current source during...
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7605655 |
Highly linear differential amplifier with a novel resistive source degeneration network
There is provided a highly linear differential amplifying circuit. The highly linear differential amplifying circuit includes: a differential amplifying unit including a main differential...
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7603096 |
Mixer with self-calibrating carrier leakage mechanism
An embodiment of a mixer with carrier leakage self-calibrating is disclosed. The mixer comprises a double balanced mixer, a gm stage comprising a first processing unit and a second processing unit,...
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7593484 |
Radio frequency (RF) receiver with double loop integrated fast response automatic gain control (AGC)
A radio frequency (RF) receiver device comprises a receiver system that receives an analog radio frequency signal and downconverts the analog radio frequency signal to a downconverted analog...
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7586376 |
Pre-power amplifier of load, switch array, and impedance compensation
A novel and useful load compensation circuit and associated pre-power amplifier constructed therefrom. The load compensation circuit functions to maintain a nearly constant output impedance of the...
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7586371 |
Regulator circuit
The present invention is contrived to adopt a differential pair type amplifier circuit comprising a differential pair constituted by a first transistor receiving an input of a first signal and by a...
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7583752 |
Transmitter for outputting differential signals of different voltage levels
A differential signal transmitter including a driver circuit that generates a differential signal in response to data input. The amplitude of the voltage swings in the differential circuit is...
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7579878 |
High gain, high speed comparator operable at low current
A comparator includes a differential pair of transistors providing a first amplification stage and receiving inverting and non-inverting input signals. An output transistor is coupled to the...
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7576619 |
Integrated circuit arrangement
An integrated circuit arrangement is disclosed. In one embodiment, the integrated circuit arrangement includes an output circuit having at least one first output connection which can provide a data...
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7570112 |
Ultrasound imaging or other use variable input impedance preamplifier
A preamplifier has a variable input impedance. The input impedance is tailored with the signal level to maintain a more optimal performance. The input impedance is varied by at least two amplifiers...
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7567121 |
Current-mode instrumentation amplifier error reduction circuit and method
A current-mode instrumentation amplifier (IA) error reduction circuit and method employs a current-mode IA topology and an auto-zero circuit. The IA receives a differential voltage (VINP−VINN)...
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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...
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7565128 |
High performance low noise amplifier
A signal processing circuit is proposed, which is intended to receive a pair of input signals Sp and Sn in phase opposition on two input terminals and to provide two pairs of output currents SIp...
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7564982 |
Two channel audio surround sound circuit
A two channel surround sound audio circuit (surround sound circuit) includes a first amplifier, a second amplifier, two polarized input capacitors, and two polarized output capacitors. A first...
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7560969 |
Receiver of high speed digital interface
A receiver of a high speed digital interface includes at least one differential amplifier, a pair of resistive elements, a current source and a pair of transistors. The differential amplifier...
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7554867 |
Capacitor boost sensing
A memory cell for storing a charge that gives rise to a cell voltage representing a bit value, the memory cell being capable of having the cell voltage boosted to a boost value at a time following...
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7545834 |
Multiple channel switch using differential de-mux amplifier and differential mux equalizer
A switch fabric that carries analog differential signals is constructed from 2×2 switches. Each 2×2 switch has two differential inputs that are applied to two demultiplexers. Each 2×2 switch...
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7545215 |
Circuit to prevent load-induced DC nonlinearity in an op-amp
A circuit for removing non-linearity produced when an amplifier includes a load that results in non-linear current levels is provided. The circuit includes a first transistor element being coupled...
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7541838 |
Transmitter swing control circuit and method
disclosed herein are embodiments of a swing compensation scheme for compensating errors in a transmitter driver.
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7532076 |
Operational amplifier
An operational amplifier includes a differential amplifier circuit provided at an input stage and an amplifier circuit at a post stage. In the differential amplifier circuit, first and third...
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7528668 |
Differential amplifier, differential amplifying method, and phase locked loop and delay locked loop using the same
A differential amplifier includes an input stage, a biasing unit and a load unit. The input stage receives a first phase signal and at least two phase signals among odd-numbered phase signals,...
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7528634 |
High voltage comparator using sliding input low voltage devices
A voltage comparator contains low voltage devices (e.g., bipolar or MOS transistors) and high voltage devices (e.g., DMOS transistors). The low voltage devices, which cannot sustain a voltage...
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7525346 |
Driver circuits and methods
In one system embodiment, the system is characterized by: a differential amplifier including but not limited to at least one amplifying transistor having an emitter coupled directly to a ground. In...
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7521996 |
Differential amplifier and radio system with a differential amplifier
A radio system for communication is provided that has a differential amplifier for amplifying a transmission frequency, particularly 2.4 GHz, wherein the differential amplifier has a first...
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7514969 |
Driver circuit and method of controlling the same
A conventional driver circuit has difficulty in controlling output voltages such as an output amplitude and a middle voltage in a CML circuit. Furthermore, in another conventional driver circuit, a...
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7511538 |
Data input buffer in semiconductor device
A data input buffer in a semiconductor is capable of avoiding operation speed deterioration of the data input buffer due to the temperature condition or process characteristic. The data input...
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7501891 |
Variable gain amplifier and differential amplifier
A variable gain amplifier includes signal amplifying transistor and first and second gain control transistors at output and non-output sides, whose emitters are connected to collector of signal...
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7482867 |
Single stage balanced voltage amplifier
A balanced voltage amplifier is disclosed as comprising a single stage containing three pairs of vacuum tube triodes configured to amplify two input signals (+INPUT, −INPUT) and to generate two...
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7477704 |
Digital signal detection for high speed signaling systems
Methods and apparatuses for detecting digital signals in high speed signaling systems. In at least one embodiment, at least one received input signal is combined with a plurality of predetermined...
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7439776 |
Technique to increase the speed of a peak detector
A peak detector can advantageously increase its bandwidth, i.e. its charging and discharging speed, while minimizing the ripple of its output signal by sensing the charging current of a storage...
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7436261 |
Operational amplifier
An operational amplifier includes: a differential amplifier circuit configured to receive an inverting input voltage (VIN−) and a non-inverting input voltage (VIN+); and an auxiliary circuit for...
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7425865 |
Differential cascode amplifier
A differential cascode amplifier is disclosed that includes in each branch two transistors connected to form a cascode circuit, and has a cross-compensation (neutralization) with at least one pair...
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7423485 |
Differential circuit with improved linearity
A differential circuit includes main transistors differentially coupled for converting differential input signals into main differential currents at output terminals. The differential circuit also...
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7420497 |
Low offset flash analog-to-digital converter
A quantizer is described for use in a flash analog to digital converter (ADC), which may be implemented as part of an integrated wireless transceiver or other highly integrated electrical circuit....
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7418213 |
Transimpedance amplifier with integrated filtering and reduced parasitic capacitance
A transimpedance amplifier (TIA) with integrated filtering. A capacitance is integrated into the TIA and connected to the power supply and to an internal ground of the TIA. Noise on the power...
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7414456 |
Constant ratio current source
A constant ratio current source comprises a first current branch which includes a first transistor that conducts a current I 1 from a first current input to a first node and a resistor R 1 ...
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7415286 |
Gain boosting for local oscillation distribution circuitry
A multi-band integrated circuit radio transceiver comprising receive and transmit radio front end circuit blocks further includes a local oscillation generator for generating a local oscillation...
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7405625 |
Common-mode control structures and signal converter systems for use therewith
Control structures are provided to accurately maintain amplifier common-mode levels at the predetermined level of a common-mode reference voltage V cm . The disclosed control structures provide...
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7389087 |
Adaptive radio transceiver with filtering
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
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7385448 |
Circuitry for adaptively generating and using a reference voltage
a circuit for an RFID device in one embodiment includes an operational amplifier having a first input, a second input, and an output where the first input receives an incoming signal, arid the...
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7382196 |
UHF active antenna amplifier for digital video broadcast (DVB) receiver and related DVB device
An active UHF amplifier includes a transistor having a base for receiving signals, a grounded emitter, and a collector for outputting signals, a first inductor having a first end for coupling to a...
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7382198 |
Differential amplifier circuitry formed on semiconductor substrate with rewiring technique
In differential amplifier circuitry formed on a semiconductor substrate, first and second transistors constitute a differential pair of the differential amplifier circuitry. First and second pads...
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7372328 |
Amplification circuit for driving a laser signal
A method of filtering a differential signal. The method includes receiving the differential signal. Transitions of the differential signal are accelerated after the differential signal has passed...
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7358777 |
Current feedback amplifiers
Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or...
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7358796 |
Input circuit for receiving a variable voltage input signal and method
An input voltage circuit comprises an input transistor having a control electrode for receiving a variable input voltage, a voltage detection transistor having a current electrode coupled to a...
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7349681 |
Self-biased high-speed receiver
A self-biased high-speed receiver is described. The receiver is powered by one power supply with the core operation voltage and one power supply with the IO operation voltage. The receiver is...
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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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7339421 |
Differential circuit and receiver with same
A differential circuit including a differential amplifier circuit having a differential element provided in a signal input circuit, a constant current source connected to the differential element,...
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