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| Number | Title | Issue Date |
| 8145168 | Wireless transceiver and wireless transmission method A DC offset of a VGA is measured by selecting a ground contact of a switch. Then, the gain of the VGA is set at an appropriate value, monitoring contacts of the switch are successively selected, and the output values of an ADC for the respective cases are measured w... | 03/27/2012 |
| 8090334 | High accuracy programmable gain amplifier A high accuracy programmable gain amplifier has reduced temperature dependency, reduced supply voltage dependency, and supports accurate amplifier gain and accurate amplifier gain steps. The high accuracy programmable gain amplifier allows requirements compliant ele... | 01/03/2012 |
| 7983642 | Method and system for detecting an out of band interferer in an RF receiver A system and method is provided for reducing signal distortion and saturation within an RF receiver which may be operated in an environment under the presence of interfering signals such as in a WiMAX environment. In an embodiment, a first gain stage and a second ga... | 07/19/2011 |
| 7894785 | Amplifier assembly, receiver comprising said assembly and method for operating a programmable amplifier An amplifier assembly and also a receiver including such an amplifier assembly is disclosed, wherein the amplifier includes a programming input for setting the gain thereof. The signal level at the output of the amplifier is compared with a reference level and a cou... | 02/22/2011 |
| 7881685 | Amplifier gain control The present invention discloses an automatic gain controller with an amplifier (10) having an amplifier output connected to a mixer (20) and a receiver signal strength indicator (100) connected to the amplifier output and to a first counter (... | 02/01/2011 |
| 7734267 | Amplifier assembly, receiver comprising said assembly and method for operating a programmable amplifier An amplifier assembly and also a receiver including such an amplifier assembly is disclosed, wherein the amplifier includes a programming input for setting the gain thereof. The signal level at the output of the amplifier is compared with a reference level and a cou... | 06/08/2010 |
| 7634244 | Variable-gain low noise amplifier for digital terrestrial applications A multi-stage amplifier assembly configured to receive a terrestrial digital television (“DTV”) input signal including multiple frequency channels. The amplifier assembly optionally includes a PIN diode coupled across differential inputs to a first stage of the ... | 12/15/2009 |
| 7599675 | Method and apparatus for receiving radio frequency signals A frequency conversion receiver comprises a passive mixer, a Low-Noise Amplifier (LNA) and a balun. The low-noise amplifier generates an amplified single-ended signal responsive to a single-ended receiver input signal. The passive mixer generates a mixer output sign... | 10/06/2009 |
| 7583944 | Demodulation and regulation concept for IR receivers A method and circuit for amplifying and demodulating amplitude-modulated signals is disclosed that amplifies a primary signal into an amplified signal, bandpass filters the amplified signal into a filtered signal, compares the filtered signal with a regulation thres... | 09/01/2009 |
| 7570934 | Automatic gain control circuit An automatic gain control circuit is disclosed. The automatic gain control circuit receives a radio frequency signal at an input. The input passes the radio frequency signal to a first gain loop having a changeable gain. A low pass filter filters the radio frequency... | 08/04/2009 |
| 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 the exponential signal to multiple control signals that are used to co... | 02/24/2009 |
| 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 |
| 7430406 | Gain control in a wireless device This disclosure is directed to techniques that can be executed by a wireless device to perform various signal processing tasks associated with wireless communication. The techniques involve gain state switching based on an output of an analog-to-digital (A/D) conver... | 09/30/2008 |
| 7406300 | Extending wireless communication RF coverage inside building A wireless communication system includes at least one repeater antenna assembly for providing adequate RF coverage within a building, such as a home. An example repeater antenna assembly has an automatically adjustable gain that is controlled responsive to a pathlos... | 07/29/2008 |
| 7400869 | System and method for adaptive DC offset compensation in wireless transmissions A first direct current (DC) component of a first amplified representation of a received signal at an output of an amplifier set to a first gain setting is determined during a first expected idle period of a received signal. A second DC component of a second amplifie... | 07/15/2008 |
| 7389093 | Call method, call apparatus and call system A call apparatus, a call method and a call system, are disclosed, in which the problem otherwise caused by fixed setting of the sound volume level of the BGM or the effect sound with respect to the call voice may be overcome. A decoded output of a decoder 17 ... | 06/17/2008 |
| 7386285 | Automatic gain control adaptive for plural modulation schemes An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, ... | 06/10/2008 |
| 7382764 | Method of controlling a receiving operation A method of controlling a receiving operation includes, receiving a transmission frame into a wireless device, and decoding the transmission frame. A header information in the transmission frame is analyzed. Then, the receiving operation is suspended in response to ... | 06/03/2008 |
| 7372834 | Method of controlling transmission power of retransmission packet and mobile terminal using the same The transmission power of a retransmission packet is controlled in the event of a packet retransmission request being sent from a receiving side in a wireless mobile communication system supporting hybrid automatic retransmission request (HARQ) transmission. In a me... | 05/13/2008 |
| 7368981 | Limit circuit A limit circuit capable of providing high gain. The limit circuit included in an FM receiver comprises, for example, seven amplifiers (11 to 17), and a BPF (18) inserted substantially in the middle thereof. Each of the amplifiers (11 to | 05/06/2008 |
| 7359690 | Single path front end with digital AGC in SDARS system A method and apparatus for automatically controlling the gain of a digital radio receiving circuit in which a single set of analogue amplifiers is used as the front end to feed two separate digital back-end, demodulating circuits, and in which, for optimal performan... | 04/15/2008 |
| 7356321 | Radio frequency tuner A radio frequency tuner is provided for selecting channels from a cable distribution network or other reception system. The tuner has one or more stages whose performance, such as signal to noise plus intermodulation, and gain are functions of the stage power consum... | 04/08/2008 |
| 7353010 | Techniques for fast automatic gain control An automatic gain control (AGC) technique can quickly sense signal size over a large dynamic range by using a peak detector block in the analog portion of the receiver. The peak detector block can compare a received signal to predetermined thresholds (chosen to divi... | 04/01/2008 |
| 7340235 | System for limiting current in an output stage of a power amplifier A system and method for limiting current in an output stage of power amplifier circuitry in a transmitter of a mobile terminal are provided. In general, the current in the output stage of the power amplifier circuitry is detected during each transmit burst from the ... | 03/04/2008 |
| 7321266 | Current-matching variable gain amplifier A current-matching variable gain amplifier is provided. The amplifier comprises a reference current source, at least one cascode amplifier, a matching circuit, a control circuit, and at least one first blocking circuit. The reference current source provides a refere... | 01/22/2008 |
| 7317757 | Transmit amplitude independent adaptive equalizer Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a contr... | 01/08/2008 |
| 7313376 | DC offset correction for a wireless communication system A system and method for performing DC offset correction in a wireless communication receiver during “dead time” are provided. The receiver includes amplifier circuitry that amplifies a received radio frequency (RF) signal, downconversion circuitry that downconve... | 12/25/2007 |
| 7305218 | RF switch An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the ... | 12/04/2007 |
| 7302245 | Method and apparatus for estimating and controlling initial time slot gain in a wireless communication system In a time-division duplex (TDD) system, a reliable initialization scheme that is applicable to an automatic gain controller (AGC) at a base station is implemented in various forms depending on the availability of certain information such as signal-to-interference ra... | 11/27/2007 |
| 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 |
| 7277685 | Automatic gain control of multiple antenna OFDM receiver A method includes amplifying the plurality of received signals, generating a plurality of time domain samples of the amplified signals with at least an analog-to-digital converter (ADC), determining at least a candidate power according to root-mean-square (RMS) powe... | 10/02/2007 |
| 7276967 | Signal level adjusting apparatus, gain value updating method, and program A signal level adjusting apparatus comprises an amplifier that amplifies an input signal with a gain of a first gain value and outputs an amplified signal; a gain calculator that obtains a second gain value according to a signal level of the input signal; and a gain... | 10/02/2007 |
| 7274920 | Methods and apparatus for reducing signal interference in a wireless receiver based on signal-to-interference ratio One illustrative method of reducing signal interference in a wireless receiver includes receiving a radio frequency (RF) signal; amplifying the received RF signal with a gain G; producing a baseband signal from the amplified RF signal; producing a signal-to-interfer... | 09/25/2007 |
| 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 |
| 7266353 | Control loop for digital signals The invention improves the control behavior of a control circuit for digital signals which is used in AGCs (automatic gain control), using a simple supplementary circuit. In a first example of an embodiment, the output signal of an integrator member is looped back t... | 09/04/2007 |
| 7260374 | Method for controlling power level of received signal in ultra wide band transmission system Disclosed is a method for controlling power level of received signal in an ultra wide band transmission system which uses multi frequency bands, and includes a pre-gain controller (PGC) and a voltage gain amplifier (VGA). The method for controlling a power level of ... | 08/21/2007 |
| 7256650 | VSWR tolerant power detector A system is provided for detecting the output power of power amplifier circuitry in a transmitter of a mobile terminal. Balanced power amplifier circuitry is provided having in-phase power amplifier circuitry and quadrature phase amplifier circuitry. A power detecti... | 08/14/2007 |
| 7257383 | Method and system for improving dynamic range for communication systems using upstream analog information The receiver is provided which comprises a mixer, a low pass filter coupled to the mixer and a plurality of gain controllers serially coupled to an output of the low pass filter (LPF). A plurality of analog-to-digital converters (ADCs) is coupled so that an input of... | 08/14/2007 |
| 7257178 | Base band circuit of receiver and low cut-off frequency control method A base band circuit of a receiver and a low cut-off frequency control means can quickly converge transition state due to gain fluctuation with setting a low cut-off frequency of a high-pass filter as low as possible. The base band circuit of a receiver has a variabl... | 08/14/2007 |
| 7248625 | Compensation of I-Q imbalance in digital transceivers A transceiver includes a switching unit configurable for isolating an input of a receiver from an output of a transmitter during a local calibration mode. A known signal present at the output at a first power level during the calibration mode will also be present at... | 07/24/2007 |
