|
Match
|
Document |
Document Title |
|
|
7609112 |
Boosted tail-current circuit
A circuit includes a pair of input transistors configured as a differential pair and having input terminals configured to receive an input voltage. The circuit also includes a first current source...
|
|
|
7605660 |
Linear multi-stage transimpedance amplifier
An apparatus comprising a first amplifier circuit, a detect circuit, a control circuit and a second amplifier circuit. The first amplifier circuit may be configured to generate an amplified signal...
|
|
|
7605659 |
Gain adjustment for programmable gain amplifiers
A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback...
|
|
|
7602247 |
Variable gain amplifier and AC power supply device using the same
A variable gain amplifier includes first and second power supply terminals arranged to be connected to a power supply, a transconductance amplifier, first and second PN junction elements, a voltage...
|
|
|
7602239 |
Variable gain amplifier circuits
A variable gain amplifier circuit has an amplifier, a string of resistors, a plurality of gain switches, a current source, and at least two current switches. A first input terminal of the amplifier...
|
|
|
7598987 |
Flicker detection gain control circuit, digital imaging system, and method
A gain control circuit includes a light detector for generating an amount of current based on received light and a first switch for controlling the amount of current from the light detector...
|
|
|
7598811 |
Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading
Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading. A novel approach is...
|
|
|
7598719 |
Switching regulator with improved power supply voltage variation response
Provided is a switching regulator having an improved power supply voltage variation response characteristic while maintaining the stability of an output voltage to oscillation. An output resistance...
|
|
|
7593701 |
Low noise CMOS transmitter circuit with high range of gain
A CMOS automatic gain control (AGC) circuit that receives an analog control voltage and generates a temperature compensated gain voltage to linearly control the gain of a variable gain circuit...
|
|
|
7592869 |
Variable gain amplifier having dual gain control
An electronic amplifier circuit that provides improved gain control linearity characteristics resulting from having a controllable field effect transistor (FET) acting as a degeneration resistance...
|
|
|
7587188 |
Radio wave reception device, radio wave clock, and repeater
A received low-frequency standard radio wave, which is an amplitude modulation signal, is converted to an intermediate frequency signal Sa, and is output to a detection circuit and an AGC circuit....
|
|
|
7586372 |
Programmable gain-frequency profile amplifier
A programmable gain-frequency profile amplifier is disclosed that includes a first gain amplifier amplifying an electrical signal based on a first gain-frequency profile, and one or more second...
|
|
|
7583166 |
Inductor Q factor enhancement apparatus has bias circuit that is coupled to negative resistance generator for providing bias signal
The present invention provides an apparatus for enhancing Q factor of an inductor. The apparatus includes a negative resistance generator coupled to the inductor for providing a negative...
|
|
|
7583144 |
Power efficient programmable amplifier
A power efficient programmable gain amplifier is disclosed that provides programmable power consumption. The amplifier may include a first gain circuit and a programmable circuit that may include...
|
|
|
7583143 |
Method and system for digitally controlling transmitter gain compensation
Methods and systems for digitally controlling transmitter gain compensation are disclosed. Aspects of one method may include applying an effective negative resistance to differential outputs of...
|
|
|
7580687 |
System-in-package wireless communication device comprising prepackaged power amplifier
A substantially rectangular shaped power amplifier module includes a power amplifier for amplifying radio frequency signals, a bias control terminal and a power sensing terminal disposed on the...
|
|
|
7579912 |
Method and system for multiple tuner application using a low noise broadband distribution amplifier
An active splitter circuit arrangement includes a first amplification module having a number of first input ports and first output ports. The first amplification module is configured to provide...
|
|
|
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...
|
|
|
7567125 |
Differential amplifier with multiple signal gains and wide dynamic range
A circuit and method for amplifying a differential input signal over a wide dynamic range using multiple signal gains such that, over a predetermined range of values of the differential input...
|
|
|
7560986 |
Variable gain amplifier and method for achieving variable gain amplification with high bandwidth and linearity
A fine granularity, wide-range variable gain amplifier (“VGA”) comprises an attenuator, a high gain signal path, a low gain signal path and a gain adjustment control to adjust a gain of the...
|
|
|
7557657 |
Variable gain amplifier with wide gain variation and wide bandwidth
A variable gain amplifier including: a differential amplification unit amplifying and outputting a difference between a first input signal and a second input signal inputted via a first input...
|
|
|
7554403 |
Gainboost biasing circuit for low voltage operational amplifier design
Bias current generation circuits and systems are disclosed. In one embodiment, a gain boosting cascode system comprises a cascode based on a transconductance amplifier and a current buffer and a...
|
|
|
7551033 |
Dynamic bandwidth compensating method and associated apparatus
A programmable gain amplifier includes an operational amplifier coupled thereto a plurality of resistors to perform a feedback control, thereby rendering a closed-loop gain
A f ( s ) = A ...
|
|
|
7551029 |
Transconductance stage providing gain control
A transconductance stage providing gain control includes an input stage to convert a first differential input voltage and a second differential input voltage to a first intermediate current and a...
|
|
|
7551023 |
Amplifier with low pass filter feedback
An amplifier is described which amplifies an input signal according to a defined amplification factor, and which generates an output signal. To reduce an offset fraction of the output signal the...
|
|
|
7548590 |
Method for determining an offset value for a gain of a transmission path, transmission path with adjustable gain, and use of the transmission path
In a transmission path having two discrete-value adjustable amplifiers, a first amplifier is set with a first gain factor and a second amplifier is set with a second gain factor. A signal is then...
|
|
|
7545213 |
Operational amplifier
An operational amplifier according to an embodiment of the invention includes: a control signal input terminal receiving a digital control signal from an external device; first and second...
|
|
|
7545210 |
Gain adjustment for programmable gain amplifiers
A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback...
|
|
|
7542530 |
Apparatus and method for controlling a digital automatic gain controller in an orthogonal frequency division multiple access communication system
An apparatus and method for controlling a digital AGC in a communication system in which power changes significantly from frame to frame. In the digital AGC controlling apparatus, an SNR estimator...
|
|
|
7542529 |
Wireless receiving device suppressing occurrence of reception error
An AGC processing portion receives a burst signal of each received frame, and measures its received power level to perform gain control of a variable gain amplifier. Unlike a conventional wireless...
|
|
|
7539468 |
Communication terminal device and amplification circuit
Power consumed by a power-variable amplifying unit for amplifying and supplying data to an antenna in a mobile telephone carrying out data transmission by changing transmission power in accordance...
|
|
|
7538612 |
Control circuit for diode based RF circuits
A control circuit for diode based RF circuit ( 6 ) comprising at least one analog communicating device ( 2, 3 ) having a plurality of digital control lines (A 0 , A 1 , A 2 , En 1 , B 0 , B 1 , B 2...
|
|
|
7536159 |
Automatic gain control using signal and interference power to obtain extended blocking performance
In a radio including analog and digital portions, with at least one A/D Convener between the analog and digital portions, and the selectivity of the radio at least partly implemented in the digital...
|
|
|
7532070 |
Analog variable gain amplifier with improved dynamic range characteristics
An automatic gain control (AGC) system and method for implementing a wide dynamic range automatic gain control (AGC) are disclosed. The AGC system features a large gain adjustment suitable for...
|
|
|
7525380 |
Method and system for varying gain exponentially with respect to a control signal
A method for varying gain exponentially with respect to a control signal is provided. The method includes receiving a primary control signal. A secondary control signal is generated based on the...
|
|
|
7521997 |
Low-power variable gain amplifier
Provided is a low-power variable gain amplifier having a direct-current (DC) bias stabilizer. The low-power variable gain amplifier includes: a load block through which first and second load...
|
|
|
7519337 |
Transmitter and mobile communication terminal using the same
A transmitter employing variable gain amplifiers and operating with both constant and nonconstant envelope modulation systems is contrived to suppress variation in the transmitting power when...
|
|
|
7518453 |
Current sense amplifier for voltage converter
A variable gain amplifier comprising a differential input amplifier comprising a pair of transistors each having an input across which an input voltage is provided, the transistors being coupled...
|
|
|
7518452 |
Voltage-controlled current source and variable-gain amplifier
A voltage-controlled current source includes a current source having temperature dependency, a voltage source having process dependency, a first signal conversion circuit which generates second...
|
|
|
7515886 |
Digital broadcast receiving tuner and receiving device incorporating it
In a digital broadcast receiving tuner, a down-converter unit converts a high-frequency signal into a baseband signal directly or by once converting it into an intermediate frequency signal. A gain...
|
|
|
7514665 |
Differential amplifier circuit with rectifier for optical pick-up device
A light-receiving amplifier circuit in which diodes are commonly connected to a differential amplifier circuit including a transistor of a differential input stage that is an inverting input unit,...
|
|
|
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...
|
|
|
7504884 |
Automatic gain control apparatus of cable modem, and lock-time acquisition method using the same
Provided is an automatic gain control (AGC) apparatus of a cable modem. The apparatus includes: a gain controller for measuring a power level of digital input signals transmitted from outside,...
|
|
|
7501893 |
Variable gain amplifier circuit
A variable gain amplifier circuit capable of eliminating circuit elements and the area for circuits when formed into an integrated circuit is disclosed. The circuit includes plural differential...
|
|
|
7501892 |
Amplifier circuit and communication device
An amplifier circuit according to the present invention comprises: a first differential amplifier circuit including a first transistor having a gate terminal forming a first input node, a second...
|
|
|
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...
|
|
|
7501887 |
Controllable amplifier and its use
A controllable amplifier is disclosed. The amplifier includes two current paths which couple an input to an output of the controllable amplifier. Each current path has a respective transistor which...
|
|
|
7496338 |
Multi-segment gain control system
Multi-segment gain control system. Apparatus is provided for a multi-segment gain control. The apparatus includes logic to convert a gain control signal to an exponential signal, and logic to map...
|
|
|
7495511 |
Input system for a variable gain amplifier having class-AB transconductance stages
A variable gain amplifier includes an attenuator having a plurality of pairs of tap points, and a plurality of pairs of gm cells, wherein each pair of gm cells is coupled to a corresponding pair of...
|
|
|
7492225 |
Gain-controlled amplifier
A gain-controlled amplifier is disclosed including: a set of switches; first and second transistors whose second terminals are coupled to each other via a resistive element; a first current mirror,...
|