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| Number | Title | Issue Date |
| 8081943 | Reception apparatus and reception method A receiving apparatus includes an amplification section that amplifies a received signal and a frequency conversion section that converts a frequency of the received signal, from a radio frequency to a baseband, the baseband having a lower frequency than the radio f... | 12/20/2011 |
| 7477882 | Reception apparatus and reception method A reception apparatus capable of calibrating a DC offset voltage fast and with high accuracy even in an environment in which interferer exist without causing noise characteristic degradation. In this apparatus, a digital signal processing section (108) contro... | 01/13/2009 |
| 7076222 | Digital controlled AGC An automatic gain control loop for a radio receiver, comprising a switchable lowpass filter (21) to reduce distortions in an analogue gain control signal (6) by switching said switchable lowpass filter (21) to a low time constant in case a chang... | 07/11/2006 |
| 7065336 | Analog base band unit for a RF receiver and method for using the same A feedback circuit for amplification of the output signal of an analog front end and suppression of its DC and low frequency components comprises a variable gain amplification unit (2) controlled by a gain control signal and a reverse path unit (6) com... | 06/20/2006 |
| 6907257 | Method and apparatus for searching for radio station for wireless ad hoc communication network A system and method wherein a master node 710 comprises, as its primary components, a protocol stack 715, a transceiver 720, a search scheduler 725, communication volume prediction means 730 and outside-channel, signal induced inte... | 06/14/2005 |
| 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 |
| 5943612 | Radio receivers A radio receiver comprising signal receiving means(10), means(12) for adjusting the amplitude of a signal received by said signal receiving means, a signal transmission system(32) coupled to said means for adjusting the signal amplitude, an agc feedback l... | 08/24/1999 |
| 5724652 | Method for acquiring a rapid automatic gain control (AGC) response in a narrow band receiver A method for acquiring rapid automatic gain control (AGC) response in a narrow band receiver teaches opening the AGC loop (100), setting the gain control signal (106) amplitude of the AGC amplifier stage (104) to a known value, altering the gain control s... | 03/03/1998 |
| 5263186 | Control loop for reducing the time of repsonse of a tuner-AGC of a superheterodyne receiver and relative leading edge differentiating circuit used in the control loop In a dynamic automatic loop for control of the overall gain of an input circuit of a superheterodyne receiver, the response time of the HF-AGC circuit of the TUNER, in response to the action of the TUNER DELAY circuit activated by the IF-AGC in the case o... | 11/16/1993 |
| 4955078 | Frequency difference detector (FDD) having automatic gain control and a carrier modulated receiver including the FDD A frequency difference detector (FDD) implemented as a balanced quadricorrelator has an automatic gain control system (68) having inputs capacitively coupled to the quadrature related, baseband frequency paths from the front end mixers (12,14). The a.g.c.... | 09/04/1990 |
| 4633518 | AGC voltage generator with automatic rate switching An AGC voltage generating circuit for an AM radio comprises a product detector adapted to receive an IF signal modulated by an AF signal and synchronously detect the AF signal, a low pass filter adapted to derive from the product detector a filtered volta... | 12/30/1986 |
| 4627098 | Automatic gain control for a remote control system having symmetrical send/receive signaling circuits The remote control system having symmetrical signaling circuits for radio communications is coupled to a single wire line/audio channel and permits two or more units, base stations and/or remote consoles, to be coupled to the single wire line. Each signal... | 12/02/1986 |
| 4313215 | Circuit for attenuating disturbing noise signals In the circuit according to the invention the entire FM-demodulator output signal is evaluated, that is to say the sum of the low-frequency signal and the d.c. voltage (AFC) component. The absolute value is produced therefrom and an attenuator circuit bec... | 01/26/1982 |
| 4179667 | Circuit arrangement for adjusting the volume of an automobile radio receiver in dependence on road noise The invention relates to a circuit arrangement for adjusting the volume of an automobile radio receiver in dependence on road noise, comprising a microphone which picks up the noise and emits an electric signal which is conducted by way of an amplifier, a... | 12/18/1979 |
| 4154980 | Noise blanker with variable rate-shut-off and/or variable blanking threshold level A noise blanker circuit for a stereo radio receiver is disclosed herein. The noise blanker circuit detects noise impulses in a received radio signal. When the magnitudes of these detected noise impulses exceed a predetermined threshold level corresponding... | 05/15/1979 |
| 3988694 | Automatic level controller An automatic level controller comprising a switching transistor connected to the output stage of an audio amplifying circuit to be turned off when the output signal of the audio amplifying circuit attains a predetermined level, a control transistor connec... | 10/26/1976 |
| 3936869 | Automatic color level circuit with peak detector A color television receiver includes an automatic chroma control (ACC) system and a switch selectable manual color level potentiometer and a closed loop automatic color level limiter (ACL) with a preset color level potentiometer. The ACL loop is of the sa... | 02/03/1976 |
