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| Number | Title | Issue Date |
| 7962112 | Heterodyne receiver A heterodyne receiver comprising a gain controllable RF mixer (14) which has a first input connected to a first local oscillator (16) and a second input connected to an RF input. The receiver comprises a peak detector (38) which detects a peak v... | 06/14/2011 |
| 7885627 | Optimal initial gain selection for wireless receiver An OFDM wireless transceiver uses a digital automatic gain control (AGC) module. The digital AGC module is configured for setting a gain to an initial gain value for mapping a received wireless signal to a first power value for an input circuit having a prescribed i... | 02/08/2011 |
| 7603094 | DC offset correction for direct conversion receivers A direct current (DC) offset correction system for a direct conversion receiver and corresponding receiver and methods facilitate reduction of DC offsets in such receivers. One method includes calibrating a DC offset correction system in a closed loop configuration ... | 10/13/2009 |
| 7440738 | Automatic gain control with two power detectors A receiver (100) adjusts its overall gain based on the detected power level of an incoming signal. The receiver is built with two detectors (D1, D2) which operate with different detecting ranges within the dynamic range of the incoming signal. I... | 10/21/2008 |
| 7414676 | Integrated programmable tuner An integrated tuner is programmable to optimize its components for either analog signal reception or digital signal reception. Power to the components is increased for analog operation and decreased for digital operation. The tuner also includes a selectable and int... | 08/19/2008 |
| 7373162 | Methods of controlling transmission power levels in air interface channels The present invention relates to wireless communications, and in particular although not exclusively, to networks of indoor collocated or overlapping wireless coverage areas especially those intended for operation in unlicensed spectrum such as the Industrial Scient... | 05/13/2008 |
| 7336935 | Dynamic power control circuit of wireless communication device The present invention is to provide a dynamic power control circuit for a wireless communication device, which comprises a power detector, a comparator, a low pass filter and an adder disposed between a radio frequency auto-gain control circuit and an antenna thereo... | 02/26/2008 |
| 7313377 | System, method, and circuit for dynamic range enhancement in a communication system A circuit includes one or more first amplifiers operable to amplify an incoming signal to produce an amplified incoming signal. The incoming signal is associated with a desired signal. The circuit also includes a controller. In response to the amplified incoming sig... | 12/25/2007 |
| 7302022 | Automatic gain control device and method in orthogonal frequency division multiplexing system with DC offset compensation function, and recording medium storing program containing the method Disclosed is an AGC (automatic gain control) device and method of an OFDM system with a DC offset compensation function, and a recording medium storing a program including the method. The AGC device calculates an energy of input signals with DC offsets as the summat... | 11/27/2007 |
| 7277511 | Two-stage non-linear filter for analog signal gain control in an OFDM receiver An analog signal gain control circuit(ASGC) for a digital radio HomePlug orthogonal frequency division multiplexing (OFDM) receiver includes a digital variable gain amplifier (DVGA) to control the gain of a received signal to achieve a desired signal amplitude to ma... | 10/02/2007 |
| 7271852 | Digital television receiver with automatic gain control unit and method An automatic gain controller (AGC) and method for use in a digital TV receiver having an IF amplifier, an RF amplifier, an analog to digital converter (ADC) connected to the IF amplifier, and a demodulator connected to the ADC, the AGC comprising: an input selector ... | 09/18/2007 |
| 7263363 | Method for mitigating intermodulation interference using channel power estimation and attenuation in a two-way radio communications system A method for maximizing intermodulation interference protection during a handoff between radio cell sites (300) includes scanning a plurality of radio channels (302) and measuring the signal power (307, 315) for at least one of the radio channel... | 08/28/2007 |
| 7245894 | Radio receiver and radio signal processing method with controlling gain A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a de... | 07/17/2007 |
| 7233206 | Semiconductor integrated circuit device and wireless communication system As the gain control amplifiers for amplifying the reception signal, the step amplifiers are used. Two sets of these step amplifiers are provided and are then controlled to be used alternately. When switching of the gain occurs, after the gain is switched with the st... | 06/19/2007 |
| 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 |
| 7212798 | Adaptive AGC in a wireless network receiver An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal ... | 05/01/2007 |
| 7197291 | Multimode receiver and method for controlling signal interference A multimode wireless receiver circuit (10) includes multi-receiver control and interference detection logic (50) and least two separate receivers: a first receiver (20) associated with a first radio access technology and a second receiver (30... | 03/27/2007 |
| 7190939 | Time division IQ channel direct conversion receiver and method therefor A direct conversion receiver includes a local oscillator for generating a sinusoid, a mixer for receiving an incoming signal and for mixing the incoming signal with the sinusoid, an analog-to-digital converter for converting the mixed analog signal into a digital si... | 03/13/2007 |
| 7190936 | Voltage regulator for high performance RF systems A voltage regulator includes a master regulator circuit that receives a reference signal, that generates a master bias signal and that includes a transistor having a first gain. A first slave regulator circuit includes a first transistor having a second gain that is... | 03/13/2007 |
| 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 |
| 7171178 | Tuning circuit having amplitude-varying function A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein t... | 01/30/2007 |
| 7076224 | Process for controlling the gain of a frequency tuner, and corresponding tuner, in particular for the reception of terrestrial digital television signals A method and device are disclosed for receiving digital television signals by a frequency tuner. The power of the signal is measured after an analog/digital conversion in the frequency tuner, and the gain thereof is controlled on the basis of this power measurement ... | 07/11/2006 |
| 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 |
| 7065334 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 06/20/2006 |
| 7054605 | Variable-gain low noise amplifier to reduce linearity requirements on a radio receiver Variable gain low noise amplifier (LNA) system to reduce linearity requirements on a radio receiver. In the receiver, the LNA is coupled to receive an RF signal and produce an amplified signal at an LNA output. The receiver also comprises a VGA coupled to the LNA ou... | 05/30/2006 |
| 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 |
| 7039377 | Switchable gain amplifier A switchable gain amplifier for use in mobile communications devices is provided, having a first amplifier stage having a first gain, a second amplifier stage connected in parallel with the first amplifier stage. The first and second amplifier stage have different g... | 05/02/2006 |
| 7031684 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 04/18/2006 |
| 7024221 | Notch filter for DC offset reduction in radio-frequency apparatus and associated methods A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry coupled together. The receiver analog circuitry receives an RF signal. The receiver analog circuitry processes the received RF signal and generates a digital signal... | 04/04/2006 |
| 6996386 | Automatic gain control circuit controlling gain of receiver including two automatic gain control amplifiers An A-rail circuit outputs a control signal AGCOUTA whereas a B-rail circuit outputs a control signal AGCOUTB in an AGC circuit. AGCOUTA controls an AGC amplifier (A) while AGCOUTB controls an AGC amplifier (B). A difference value between a power of an input signal a... | 02/07/2006 |
| 6980778 | Split shift phase sweep transmit diversity Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not degrade performance using a transmission architecture that incorporates a form of phase sweep transmit diversity (PSTD) referred to herein as split shift PSTD. Split s... | 12/27/2005 |
| 6961552 | LNA gain adjustment for intermodulation interference reduction The radio receiver includes a low noise amplifier that amplifies a received signal to one of three different gain settings. One gain setting is maximum amplification, a second gain setting is 6 dB below maximum amplification and a third gain setting is 32 dB below m... | 11/01/2005 |
| 6954624 | Transmitter and wireless communication device having a low power bypass branch A transmitter into which a modulated signal (TX) is fed, the transmitter comprising an adjustable amplifier (1) for adjusting transmission power level, the modulated signal (TX) being fed into to the input of the amplifier (1), an amplification branch ... | 10/11/2005 |
| 6950641 | Apparatus, and an associated method, for increasing receiver sensitivity of a direct conversion receiver Apparatus, and an associated method, for a direct conversion receiver by which to selectably increase the sensitivity of the receiver. The direct conversion receiver includes a baseband amplifier positioned in front of a baseband filter, and coupled to receive a dir... | 09/27/2005 |
| 6904273 | Method and system for automatic gain control in a satellite communications system An apparatus for providing automatic gain control for use in a satellite terminal of a satellite communication system capable of transmitting a plurality of different modes of data. The apparatus includes a demodulator circuit having an analog to digital converter; ... | 06/07/2005 |
| 6853838 | Biasing circuit for degenerated differential pair An improved single-ended input differential pair amplifier stage comprises: 1) a first p-n-p transistor having a base terminal coupled to an input voltage; 2) a first load impedance having a first terminal coupled to a ground reference and a second terminal coupled ... | 02/08/2005 |
| 6804501 | Receiver having gain control and narrowband interference detection A receiver generates two metrics, one that is used to control the gain of an amplifier and the other that is used to determine the presence of narrowband interference, such as IMD. The two metrics may represent analog-to-digital converter (A/D) saturation and averag... | 10/12/2004 |
| 6771719 | Automatic gain control method and its system The automatic gain control method with little being influenced of the unnecessary electric wave, even if strong unnecessary electric wave is near the frequency of input signal, is offered by carrying out change of the delay point level. The automatic gain con... | 08/03/2004 |
| 6748092 | Hearing aid with improved percentile estimator The invention relates to a hearing aid, preferably a programmable hearing aid, having at least one microphone (1), at least one signal processor with at least one channel, an output amplifier (9) and an output transducer (10), at least one of th... | 06/08/2004 |
| 6728524 | Automatic gain control circuit for controlling two AGC amplifiers An automatic gain control circuit includes a power calculator for calculating power of a modulation wave supplied to a demodulator; a power comparator for comparing the power calculated by the power calculator with ideal power of a modulation scheme of the modulatio... | 04/27/2004 |
