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7302021 Digital broadcast receiving apparatus  
In a digital broadcast receiving apparatus for amplifying a received modulated digital signal wave with automatically adjusted gain and demodulating the modulated signal wave to a digital signal, a...
7292103 Amplifier system having compensated amplification variation  
An amplifier system is provided for amplifying an input signal to provide an amplified output signal, amplifying an amplified input signal to provide a further amplified output signal, and phase...
7199665 Single to dual non-overlapping converter  
A converter includes an input circuit to receive a single-ended input signal to generate a number of control signals. The control signals have a delay different from one another relative to the...
6977548 Predistortion circuit, low-distortion power amplifier, and control methods therefor  
An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105 . An amplitude difference between low-frequency-side...
6960957 Predistortion circuit, low-distortion power amplifier, and control methods therefor  
An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105 . An amplitude difference between low-frequency-side...
6859101 Frequency-selective phase/delay control for an amplifier  
The insertion phase or delay of an amplifier can be controlled by comparing signals from the amplifier path with signals from a corresponding reference path without requiring the overall signal...
6831516 Method of forming a variable propagation delay semiconductor device and structure therefor  
A differential amplifier ( 10, 60 ) is formed to have a propagation delay that varied responsively to a control signal received on a differential control signal input. The propagation delay is...
6763470 System and method for dynamically amplifying a delayed analog signal based on amplitude information obtained from its digital representation  
The present invention is directed to a signal processing and amplifying system that uses advance knowledge of a digital signal, before it is converted to analog form and applied to the input stage...
6664850 Delay variability reduction method and apparatus  
A method for reducing delay variability in a differential receiver includes receiving a plurality of differential input signals, determining a first transition delay time of an output in response...
6603359 High-frequency power amplifying apparatus  
A high-frequency power amplifying apparatus includes a plurality of series-connected amplifiers, a power controller for selectively supplying an output terminal with an output from a desired one...
6590449 Predistortion circuit, low-distortion power amplifier, and control methods therefor  
An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105 . An amplitude difference between low-frequency-side...
6573786 Electronic devices comprising an audio amplifier and methods for controlling such electronic devices  
An electronic device comprises an audio amplifier, a main microprocessor and a user interface microprocessor. The UI microprocessor has a control pin for muting the audio amplifier. A muting...
6531921 Operational amplifier  
An operational amplifier includes a differential amplification circuit, a voltage amplification circuit, a capacitor, and a bias setting circuit. The differential amplification circuit includes...
6484017 Up converter of base station transmitter in wireless communication system and method of controlling outputs thereof  
Disclosed an up converter of base station transmitter of an wireless communication and method of controlling outputs of the up converter to control output signals of the up converter in accordance...
6380804 Method and apparatus for switching stages of a multistage amplifier quickly between operational modes  
The stages of a multistage amplifier are quickly switched between operational modes, e.g., from a standby mode to an active mode. The delivery of a control signal to each individual stage is...
6133789 Method and system for robustly linearizing a radio frequency power amplifier using vector feedback  
A method of linearizing an amplifier having an input and an output involves the steps of amplifying the amplifier input signal with a vector modulator having a gain adjustment signal input for...
6121835 Variable time delay network, method and apparatus thereof  
A variable time delay network (210) includes segments (270, 260) which are connected in parallel to form variable time delay network (210). Segment (270) includes a varactor diode (222) and an...
6107879 Automatic dynamic range control circuit  
An automatic dynamic range control circuit is provided with a fixed-gain first circuit means and a variable-gain second circuit means having substantially the same propagation delay as the first...
6047167 Output power control device  
A comparator (5) compares a detected voltage obtained by detecting an output power of a nonlinear amplifier (2) with a reference voltage to generate a control voltage for the nonlinear amplifier...
5805022 Circuit for automatically regulating the gain of a differential amplifier  
A circuit having a double half-wave rectifier connected to the outputs of a differential amplifier in order to produce two quantities dependent on the amplitudes of the half-waves of the output...
5745016 Method for improving power measurement implemented with a directional coupler at low power levels  
The invention relates to a directional coupler arrangement and measurement of radio frequency electric power with a directional coupler arrangement, which arrangement comprises a directional...
5699017 Automatic gain control circuit  
An automatic gain control circuit is provided, which has minimum variations in the output signal level even with the presence of variations in component parts thereof and the temperature dependency...
5677962 Hybrid analog and digital amplifier with a delayed step change in the digital gain  
An amplifier comprises a variable gain analog amplifier for amplifying an input analog signal to generate an intermediate analog signal, the gain of the analog amplifier being switchable between...
5672999 Audio amplifier clipping avoidance method and apparatus  
An audio amplifier clipping avoidance apparatus (140) identifies signal segments of an audio signal that can have an amplitude peak greater than a particular amplifier clip avoidance threshold...
5606285 Power control circuit for use with transmitter  
A power control circuit having a saturation preventing control loop including a variable gain amplifier, an RF power amplifier, a directional coupler, a detecting circuit, a comparator, a switch,...
5548833 Data independent automatic gain control circuit for telecommunication applications  
A data independent AGC control circuit for telecommunication applications is provided and includes an AGC amplifier, a fixed gain amplifier, a capacitor, and first, second, and third control...
5515008 Output level automatic control apparatus  
An output level automatic control apparatus suitable for use to keep a transmitted output level of a radio system constant has an objective to prevent an output level above a specified value from...
5515004 Method and apparatus for precision gain control for amplified signals  
An automatic gain control circuit (100) provides precision gain control for amplified signals. An offset generator (130) generates an offset signal (132) from an output signal (108) of a variable...
5483198 Method and apparatus for controlling amplifier power  
A method and apparatus for controlling an amplifier power output, in particular, a transmitter RF Amplifier includes a control circuit connected to the RF Amplifier. The control circuit derives a...
5475342 Amplifier for stably maintaining a constant output  
An amplifier having an automatic threshold control circuit (ATC) and a limiting amplifier. The ATC detects and holds a top value (peak value) and bottom value of an input signal, and outputs the...
5412341 Power control apparatus and method for a radio frequency amplifier  
A power controller for a class C radio frequency power amplifier that exhibits an output power threshold, including a detector circuit (299) that detects a output power level to provide a level...
5404115 Variable gain amplifier  
An amplifying system for variably amplifying electrical input signals, depending on magnitudes of those signals, with the variation in amplification being selectable as is substantially the maximum...
5363057 Control device for power amplifier  
A control device for a power amplifier controls the power amplifier upon a rise in output power based on a power variation pattern stored in storage means to suppress a power overshoot which occurs...
5339046 Temperature compensated variable gain amplifier  
An amplifier for a radio transceiver overcomes the problem of gain being dependent on ambient temperature. Transmission power is matched to strength of a received signal by providing matched dual...
5337020 Differential radio frequency detector/comparator for power level control  
An automatic level control circuit for radio frequency power amplifiers which is immune to temperature and power supply induced variations. The level control circuit (42) employs a...
5337006 Output level control circuit for use in RF transmitter  
An output level control circuit for radio-frequency transmitter which intermittently transmits radio-frequency carrier waves such as seen in the TDMA radio communication system and the digital...
5327101 Distortion-free limiter for a power amplifier  
A distortion limiter for limiting the amount of distortion of an inverting amplifier is disclosed. A comparator produces a pulse when a signal level at an inverting input of the inverting amplifier...
5304947 Arrangement for eliminating offset errors in a power control circuit of a pulsed transmitter final amplifier  
A high frequency power amplifier amplifies periodic signals in the form of HF bursts. The power output of the amplifier is adjusted by a control loop which produces a control signal in response to...
5203016 Signal quality-dependent adaptive recursive integrator  
The gain of a recursive integrator is controlled so as to be adaptive to the quality of a received signal by comparing the magnitude of its emphasized information component with a reference voltage...
5122760 Detector for automatic gain control amplifier circuit  
A detector for use in an automatic gain control amplifier and operated to generate a gain control voltage in response to an amplitude of the output signal of an amplifier circuit includes five...
5063311 Programmable time delay circuit for digital logic circuits  
An ECL logic circuit having differential inputs and differential outputs and programmable propagation delay time is provided. The differential inputs are coupled to a first differential amplifier...
5051707 Gain control circuit for amplifier having stepwise variable gain  
A gain control circuit for an amplifier having a stepwise variable gain is disclosed, which includes a peak detector detecting and holding a peak value of an output voltage of the amplifier, a...
5045809 Automatic gain control (AGC) circuit for a trunk interface in a private branch exchange (PBX)  
An Automatic Gain Control (AGC) circuit which compensates receiving sensitivity on the part of subscribers depending on the line status of a central office line (C.O.L.) in a private branch...
4987383 Integrated compression amplifier having programmable threshold voltage  
An integrated compression amplifier that can be constructed in CMOS technology and whose threshold voltages are programmable. The compression amplifiers can be built into a multi-channel AGC...
4870372 AGC delay on an integrated circuit  
Circuitry is disclosed for staggering the onset of gain reduction in a series of cascaded gain stages as a function of received signal strength. The staggering is effected by controlling the area...
4829270 Compansion system  
An improved compansion system that more effectively increases the dynamic range of other circuit elements. The system includes both a compression circuit to limit the input signal amplitude for a...
4779059 Current mirror circuit  
A current mirror circuit including an operational amplifier connected to transistors of the current mirror circuit such that operating points of the transistors, that is, the emitter electrodes,...
4743863 Device to increase the dynamic ratio of an amplifier circuit, especially that of an on-board MLS receiver  
To increase the dynamic ratio of an amplifier, it is preceded by a switchable attenuator which is switched on when the output voltage of the amplifier exceeds a threshold, this output voltage being...
4694201 Current-saving CMOS input buffer  
A current-saving CMOS signal input buffer is provided, having at least two CMOS output transistors (each having an input) connected in complementary fashion with a common output taken therebetween,...
4647876 Extended response dynamic noise reduction system  
A noise reduction system compresses an input signal at a constant ratio in response to a control signal derived from the compressed signal. Added to the derived control signal is a counterfeit...
Matches 1 - 50 out of 128 1 2 3 >