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| Number | Title | Issue Date |
| 8041323 | Portable electronic unit A portable electronic unit has a transmission-side section that transmits a signal and a receiving-side section that receives a signal from the transmission-side section. The receiving-side section includes a gain control amplification device that amplifies and outp... | 10/18/2011 |
| 7680473 | Circuits and methods for signal gain control A signal gain control circuit. A gain stage receives and amplifies an analog signal by a first gain factor adjusted by a gain adjusting signal in a periodic manner with a first period, and outputs an amplified signal. An analog to digital converter converts the ampl... | 03/16/2010 |
| 7433431 | Staggered AGC with digitally controlled VGA A method of and device for automatic gain control (AGC) incorporates digitally controlled variable gain amplifiers (VGAs). An AGC circuit comprises multiple AGC stages, where each of the stages comprises: respective I and Q VGAs; a detector for detecting respective ... | 10/07/2008 |
| 7272371 | Radio receiver and radio receiving method A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback cont... | 09/18/2007 |
| 7248890 | Channel power balancing in a multi-channel transceiver system A transceiver according to some embodiments of the present invention receives data from a plurality of frequency separated transmission channels from a complementary transmitter of another transceiver and adjusts the power output of certain channels in a transmitter... | 07/24/2007 |
| 7215937 | 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. The detection circuit and AGC circuit generates an RF control signal ... | 05/08/2007 |
| 7184730 | Automatic gain control system having a wide range of continuous gain control An automatic gain control system (100) and methods thereof for a receiver for providing a wide range of continuous gain control has been discussed. The AGC includes an input stage (120) for providing an indication of a strength of a received signal; an... | 02/27/2007 |
| 7158590 | Gain control in wireless LAN devices A signal pre-processing device particularly in wireless LAN devices is provided that comprises an AGC (Automatic Gain Control) unit, an ADC (Analog-to-Digital Converting) unit and a normalization unit. The AGC unit amplifies a received analog input signal and output... | 01/02/2007 |
| 7155185 | Apparatus and methods for eliminating DC offset in a wireless communication device Apparatus and methods for eliminating DC offset in a wireless communication device operable on a continuous basis or on a sampled basis. In a receive channel, the output of a forward variable gain amplifier is fed back to an RC circuit to charge the capacitor (C) to... | 12/26/2006 |
| 7155187 | Digital cordless telephone The present invention improves an inconvenience of the conventional system in that cordless hand sets must be registered in advance, and reduces the power consumption in the waiting state. The digital codeless telephone according to the invention uses a public telep... | 12/26/2006 |
| 7149487 | Mobile communication terminal device and variable gain circuit In receiver systems for cellular phones using the W-CDMA method, the change in DC voltage occurring when the gain of a programmable gain amplifier (PGA circuit) is switched to adjust the gain for a received signal, can be suppressed. A sample-and-hold circuit is ins... | 12/12/2006 |
| 7113758 | Automatic gain controller Disclosed is an automatic gain controller capable of reducing signal saturation or signal distortion caused by out-of-band signals of a filter extracting an object signal or delay of a control signal and capable of precisely measuring a signal level in a filter band... | 09/26/2006 |
| 7099641 | Receiver circuit for mobile radio receivers with automatic gain control A receiver circuit for a mobile radio receiver has a controllable amplifier with a variable gain level, an analog-digital converter stage, a digital filter configuration for the purpose of channel selection and a signal strength estimator. The signal strength estima... | 08/29/2006 |
| 7068988 | Radio reception apparatus, signal processing timing control method, and signal processing timing control program In a radio reception apparatus, a variable gain of a reception amplifier is adjusted by an AGC control unit for each frame of a received signal for execution of an AGC operation. The AGC control unit determines and indicates to a digital signal processing unit an AG... | 06/27/2006 |
| 7050774 | AGC circuit of an FM receiver that reduces interference while maintaining high reception sensitivity A first AGC voltage and a second AGC voltage are taken from the final stage of a radio-frequency circuit and the output side of a bandpass filter, respectively, and the gain of the radio-frequency circuit is controlled on the basis of the two AGC voltages. The pass-... | 05/23/2006 |
| 6963733 | Method and apparatus for reducing the effect of AGC switching transients The present invention reduces automatic gain control (AGC) transients using first and second AGC processing branches to receive a signal. A gain is selectively adjusted (if desired) in the one of the AGC processing branches during a first time period. However, a gai... | 11/08/2005 |
| 6885851 | Automatic gain control circuit and receiver device having the automatic gain control circuit, and automatic gain control method An automatic gain control circuit optimizes a follow-up performance of an automatic gain control loop to thus assure a good receiving operation. A generation timing or a generation period of a control signal GC is decided in response to a lapsed time in operation of... | 04/26/2005 |
| 6885752 | Hearing aid device incorporating signal processing techniques A hearing compensation system for the hearing impaired comprises a plurality of bandpass filters having an input connected to an input transducer and each bandpass filter having an output connected to the input of one of a plurality of multiplicative AGC circuits wh... | 04/26/2005 |
| 6859505 | Method, apparatus and system for use in determining pilot-to-data power ratio in wireless communication A method, apparatus and system for use in determining a pilot-to-data power ratio by receiving a data symbol (122) having a data amplitude, receiving a pilot signal (124) having a pilot amplitude, reverse training (350) an automatic gain (154... | 02/22/2005 |
| 6668172 | Reception apparatus and reception processing method A reception apparatus and a reception processing method are proposed to improve a reception characteristic by compensating deterioration of transmission quality independently of the traveling speed of a terminal. When a transmission signal sent via a radi... | 12/23/2003 |
| 6580905 | System and method for controlling the level of signals output to transmission media in a distributed antenna network A system and method are provided for controlling the gain of signals transported over transmission media in a distributed antenna network. The system includes a plurality of remote antenna units where each remote antenna unit includes a signal level compa... | 06/17/2003 |
| 6285863 | System and method for providing automatic gain control with high dynamic range A system and method for providing automatic gain control (AGC) with high dynamic range. An AGC system comprises an open loop control system and a closed loop control system. The open control loop system senses the power level of an input signal and prepro... | 09/04/2001 |
| 6169619 | Apparatus and method for reception of optical signal An optical signal receiving apparatus capable of substantially instantaneously and stably discriminating the logic from the header of a burst-like optical signal comprising a pre-amplifier circuit for amplifying an output from a photodiode receiving cell ... | 01/02/2001 |
| 6122331 | Digital automatic gain control An automatic gain control, AGC, circuit comprising with a preferred transition region. A gain correction unit is responsive to an attenuate command and amplify command coming from a feedback system monitoring the AGC's output. The feedback system can indi... | 09/19/2000 |
| 6088583 | Automatic gain control circuit In an automatic gain control (AGC) circuit for controlling a preceding gain control unit and a following gain control unit, the AGC circuit according to the present invention includes at least a comparison unit, a first gain control signal output unit and... | 07/11/2000 |
| 6072844 | Gain control in post filtering process using scaling A second post filter having characteristics similar to those of a first post filter used in the signal path is prepared and a gain of the first post filter is preliminarily presumed from an input and an output of the second post filter. An optimum scaling... | 06/06/2000 |
| 5913154 | VSWR control technique for terminal products with linear modulation A method for improving linear modulation compensation at the antenna terminals of an RF device in order to react to high voltage standing wave ratio variations is disclosed. In the present RF transmitters, such as portable radios, when transmission voltag... | 06/15/1999 |
| 5878334 | High temperature superconducting low power receiver protector/clutter automatic gain control for radar receiver The present invention provides for a low power receiver protector and stepped attenuator for conditioning a received input signal within a microwave receiver front end. The low power receiver protector includes a detector for generating a surge signal in ... | 03/02/1999 |
| 5826170 | Satellite communication power management system Disclosed is a method for operating a communications signal transmitter and apparatus for carrying out the method. The method includes the steps of receiving a communications signal; sensing an amount of user demand; adjusting an output of a power supply ... | 10/20/1998 |
| 5768699 | Amplifier with detuned test signal cancellation for improved wide-band frequency response A feed forward amplifier circuit which includes a main amplifier, an error correction circuit producing a message error signal, an error amplifier for producing an amplified message error signal that is then subtracted from the amplified and distorted mes... | 06/16/1998 |
| 5742900 | Voltage-variable biased inverting limiter for RFI suppression overview An enhanced nonlinear processor for RFI suppression uses a biased inverting limiter circuit. There are two parallel paths in the device; the first one is used to estimate the intensity of the RFI signal, the second one is used to process the signal. The f... | 04/21/1998 |
| 5740524 | Feed-forward RSSI assisted radio frequency amplifier power control A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio ... | 04/14/1998 |
| 5694433 | Efficient linear power amplification A method and apparatus for producing amplified signals for communications having reduced adjacent channel energy involving generating a first signal having an undesired amount of adjacent channel energy, generating a second signal corresponding to the und... | 12/02/1997 |
| 5678214 | RF receiver using if amplifier operative during low level reception In a radio-frequency receiver, a received RF signal is converted to an intermediate frequency (IF) signal and band-limited by a first IF filter to a channel bandwidth. The level of the output of the IF filter is detected by a detector and compared with a ... | 10/14/1997 |
| 5678198 | System for controlling signal level at both ends of a transmission link, based upon a detected value The present invention is directed to a dynamic range enhancing system for increasing the dynamic range of a transmission link, characterized as either an analog or digital link. The system includes a pre-processing unit, provided at a first location, that... | 10/14/1997 |
| 5623521 | Digital gain controller and gain control method A current optimal gain can be calculated directly from an effective value of an input signal by increasing the speed of the initial response without using a feedback loop, in a manner such that a mean power of the input signal and the square-root of the m... | 04/22/1997 |
| 5564092 | Differential feed-forward amplifier power control for a radio receiver system A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio ... | 10/08/1996 |
| 5535444 | Diode loaded feed-forward radio frequency amplifier power control A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable in an unconditionally stable manner. The selective call receiver (100) includes a loading diode (403) coupled to an output of the ... | 07/09/1996 |
| 5493712 | Fast AGC for TDMA radio systems Disclosed is a circuit for automatic gain control (AGC) of random access channels (RACH) and traffic channels in a radio system. The amplitude of the input signal is detected at an intermediate frequency (IF) stage, digitized, and coupled to a digital sig... | 02/20/1996 |
| 5471651 | Method and system for compressing the dynamic range of audio signals An audio signal has its dynamic range compressed by a system which first samples a block of the audio signal (10), typically several seconds long. The level of the signal in this block is analyzed (12, 14) and an ideal signal level is calculated for the b... | 11/28/1995 |
