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Telecommunications > Transmitter > Power Control, Power Supply, Or Bias Voltage Supply > Gain Control Gain ControlGain Control patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/23/06 - 20060264191 - 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 performance, each of the two digital demodulating circuits ... 10/05/06 - 20060223463 - Method and apparatus for dynamic gain and phase compensations Dynamic gain and phase compensation is provided in a radio frequency (RF) receiver (106) including at least one switched Low Noise Amplifier (LNA) (212) coupled to an RF gain control unit (226) providing a gain control signal to the at least one switched LNA (212) for control thereof. The RF ... 09/28/06 - 20060217089 - Radio frequency power amplifier and corresponding method A radio frequency power amplifier and corresponding methods are arranged and configured to drive or provide a radio frequency signal to a resonant load. The amplifier includes a radio frequency switching stage with an output that is coupled to a resonant circuit and configured to provide an output signal with ... 08/24/06 - 20060189285 - Communication semiconductor integrated circuit, a wireless communication apparatus, and a loop gain calibration method A polar-loop wireless communication apparatus includes, on a forward path between an amplitude detector and a power amplifier which constitute an amplitude control loop, a variable gain amplifier and a switch to change characteristics of a loop filter to output a frequency bandwidth of the amplitude control loop to an ... 08/24/06 - 20060189284 - Transmitter and mobile communication terminal using the same With a dual mode transmitter capable of handling two modulation methods for nonconstant amplitude modulation and constant amplitude modulation, respectively, speed-up of transition between modes is implemented. In a mode handling the constant amplitude modulation, first capacitors included in a low-pass filter constituting an AM loop, and a second capacitor ... 08/03/06 - 20060172715 - Digital transmission circuit and method providing selectable power consumption via multiple weighted driver slices A digital transmission circuit and method providing selectable power consumption via multiple weighted driver slices improves the flexibility of an interface while reducing transmitter power consumption, area and complexity when possible. A cascaded series of driver stages is provided by a set of parallel slices and a control logic that ... 06/01/06 - 20060116090 - Amplifier gain and phase stabilizer Methods and apparatus are provided for stabilizing the phase and gain of an amplifier in a power pooling arrangement. A pilot signal combining a reference carrier frequency with a reference sideband frequency is passed through the amplifier via an adjustable phase shifter and an adjustable attenuator in the amplifier input ... 05/25/06 - 20060111061 - 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 ratio (SIR), spreading factors and other parameters. A more accurate estimation of ... 05/25/06 - 20060111060 - Power control circuit, semiconductor device and transceiver circuit using the same There is provided a power control circuit having a stable high-speed operation, and a semiconductor device and a transceiver circuit using it. The power control circuit controls the gain of an amplifier so that power outputted from the amplifier reaches a desired value according to a digital control signal. The ... 05/25/06 - 20060111059 - System and method for detecting radio frequency signals over a range of powers The present invention is directed to a power detection circuit for use in a wireless transmitting device. The circuit makes use of multiple gain paths so that two or more scaling factors are provided. Each scaling factor allows the detector circuit to provide more ADC levels per dB and thus ... 03/30/06 - 20060068727 - Method and system for dynamic range power control A system for current efficient dynamic power range control in a transmitter lineup (10) can include a switched mixer (18) coupled to a switched step attenuator (20) and a switched power driver (22) coupled to the switched step attenuator. Linearity and efficiency can be substantially maintained for more than 70 ... 03/23/06 - 20060063498 - Apparatus and method for transmitting a signal at less than a standard transmit power in a network A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be ... 03/16/06 - 20060057982 - Transmission apparatus and mobile communication terminal apparatus An output level of a transmission apparatus 1 is determined, depending on an attenuation amount of an attenuator 30, a gain of one of a high output level amplification section 17 and a low output level amplification section 18, which is used. A reference voltage Vref(H) is discontinuously changed. Depending ... 03/16/06 - 20060057981 - Communication terminal device and amplifying circuit The power-variable amplifying unit is constituted with a variable gain amplifier (21) in which a gain is variably controlled with a control voltage corresponding to the above-described TPC bit, a driver amplifier (22) with a fixed gain, and a power amplifier (23) with a fixed gain. Then, a variable resistance ... 03/09/06 - 20060052070 - Proactive gain control system for communications receivers The present invention discloses a proactive gain control system for a communications receiver. The proactive gain control system includes a variable gain module for outputting an output signal in response to an input signal. A detector detects the output signal and outputs a detection signal representing a signal strength of ... 03/02/06 - 20060046667 - Power amplifying circuit in mobile terminal The present invention relates to a power amplifying circuit of a mobile terminal and, more particularly, to a voltage gain control circuit in a mobile terminal which is capable of acquiring a variable voltage gain. The present invention includes a transceiver controller to produce a voltage gain control signal and ... 01/05/06 - 20060003716 - Radio communication terminal and gain control circuit for the same A gain control circuit has a transmission power amplifier that amplifies a transmission signal to a predetermined level. An adjacent channel leak power ratio monitor finds a ratio of a distortion element corresponding to an adjacent channel leak power to a main element from an output signal supplied from the ... 12/29/05 - 20050287967 - Low noise high isolation transmit buffer gain control mechanism A novel apparatus for a low noise, high isolation, all digital transmit buffer gain control mechanism. The gain control scheme is presented in the context of an all digital direct digital-to-RF amplitude converter (DRAC), which efficiently combines the traditional transmit chain functions of upconversion, I and Q combining, D/A conversion, ... 12/22/05 - 20050282508 - Method and apparatus for controlling a tx power amplifier A method and an apparatus for controlling a TX power amplifier are provided in the present invention. The invention is applied for generating a power control curve in a power variation area to control the power variation for signal transmission when the TX power amplifier transmits the data during two ... 11/10/05 - 20050250459 - Compensation of a dc offset in a receiver A method of compensating a direct-current offset coupled into a receiving path of a receiver, the receiving path having at least one gain factor adjustable by a gain control, which method first determines an amount of a direct-current offset present at a selected end point in the receiving path. A ... 10/20/05 - 20050233713 - Method and system for compensating for phase variations caused by transmitter activation A method and apparatus that reduces the amount of constellation rotation due to power amplifier (PA) insertion phase variation during activation (i.e., turn on) of a transmitter. This is accomplished by applying an instantaneous phase rotation during the transmitter turn on at digital baseband to counteract and minimize unwanted phase ... 10/13/05 - 20050227645 - Transmission device and automatic gain control method A transmission control section 101 temporarily stores a transmission signal, outputs the stored transmission signal to a coding section 102 and outputs transmission timing information to a counter section 107. A preamble insertion section 104 inserts AGC preambles corresponding to the number set by a preamble number control section 110 ... 07/21/05 - 20050159119 - Reflected power suppression circuit An amplifier 3 amplifies a transmission signal, and outputs the amplified signal to anantenna. A directional coupler 6 causes a portion of power passing through a first path connecting the amplifier 3 and the antenna to branch to a second path. A detection section 7 detects an electrical parameter changing ... 07/21/05 - 20050159118 - Method and apparatus for compensating code channel power in a transmitter It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative to the other code channels is dependent upon the total transmit power due to non-linearities in the transmitter. Methods and ... 07/14/05 - 20050153671 - Wireless communication apparatus and transmission power control method thereof A wireless communication apparatus includes a variable power amplifier (19) and a power amplifier (20). A variable power amplifier control unit (24) controls the gain of the variable power amplifier (19) for controlling transmission power of the own apparatus. At this time, a condition change detecting unit (28) detects changes ... 06/23/05 - 20050136869 - System and method for rf power control The present invention provides a system and method for radio frequency (RF) power control that can adjust and transmit the RF power to the transmitting device according to the data rate under which the RF signal is going to transmit. ... 06/02/05 - 20050118966 - Simple crest factor reduction technique for multi-carrier signals A technique for Crest Factor reduction of multi-carrier signals is described. The input to the multi-carrier amplifier is modified by a Crest Factor reduction circuit, prior to being applied to the amplifier. The Crest Factor reduction circuit clips the amplitude of the signal, converts the clipped signal to baseband to ... ### FreshPatents.com Support |