Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8165543 | Power amplifier adjustment for transmit beamforming in multi-antenna wireless systems One or more beamsteering matrices are applied to a plurality of signals to be transmitted via multiple antennas. The plurality of signals are provided to a plurality of power amplifiers coupled to the multiple antennas after applying the one or more beamsteering mat... | 04/24/2012 |
| 8160520 | Supply control for multiple power modes of a power amplifier In one embodiment, the present invention includes an apparatus having at least two gain stages to receive incoming signals and to output amplified signals, along with multiple regulators. More specifically, a linear regulator can be coupled to the first gain stage t... | 04/17/2012 |
| 8155606 | RF power amplifier device and wireless communication terminal device A RF power amplifying device is constituted by a system of a balanced amplifier including first phase shifters, a first RF power amplifier, a second RF power amplifier, second phase shifters, and a power combiner. Transmitting power Pout is detected by a first power... | 04/10/2012 |
| 8145160 | Tx module for wireless communication A Tx module includes a plurality of power amplification units, a plurality of matching circuit units configured as transformers having input ports connected to output ports of the plurality of power amplification units, respectively, and a plurality of harmonic filt... | 03/27/2012 |
| 8014740 | Method and system for amplitude calibration for polar modulation with discontinuous phase Aspects of a method and system for amplitude calibration for polar modulation with discontinuous phase may include amplifying a signal via a plurality of amplifiers such that a combined gain of the plurality of amplifiers comprises a coarse amplitude gain, an amplit... | 09/06/2011 |
| 8010067 | Long range RFID transmitter power tracking loop A high power amplifier having an automatic gain control circuit, the high power amplifier being coupled between the output end of an RF signal carrying coaxial cable and a transmitting antenna to automatically compensate for RF signal attenuation over the length of ... | 08/30/2011 |
| 8005445 | RF power amplifying device and wireless communication terminal device A RF power amplifying device is constituted by a system of a balanced amplifier including first phase shifters, a first RF power amplifier, a second RF power amplifier, second phase shifters, and a power combiner. Transmitting power Pout is detected by a first power... | 08/23/2011 |
| 8000664 | Linear high powered integrated circuit amplifier A linear high powered integrated circuit amplifier includes a plurality of power amplifiers, balanced integrated circuit coupling, and a combining circuit. The balanced integrated circuit coupling couples a signal to the plurality of power amplifiers to the up-conve... | 08/16/2011 |
| 7957712 | Double-LINC switched-mode transmitter Disclosed herein are methods and apparatus for processing an input information signal having varying amplitude and phase to obtain an amplified output signal having the same amplitude and phase variation. In an exemplary method, an input information signal is decomp... | 06/07/2011 |
| 7953380 | High efficiency RF transmitter system using non-linear amplifiers An RF transmitter with improved efficiency and good linearity decomposes an input AM signal into two signal envelopes with phased modulation at a phase angle θ. The transmitter has three principal embodiments. A first solution uses at least one added RF amplifier f... | 05/31/2011 |
| 7907921 | Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second no... | 03/15/2011 |
| 7899420 | Wireless transmission device in which transmission output is controlled in feedback control A wireless transmission device includes a RF power amplification section for amplifying a transmit RF signal and outputting the amplified signal to a transmission antenna, a detector section, and a control section. The RF power amplification section includes a plura... | 03/01/2011 |
| 7844235 | RF power transmission, modulation, and amplification, including harmonic control embodiments Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 11/30/2010 |
| 7840198 | Method and system for processing signals in a high performance receive chain Aspects of a method and system for processing signals in a high performance receive chain may include amplifying radio frequency signals in amplifier chains in a multistandard radio frequency front-end, comprising one or more shared processing stages, and combining,... | 11/23/2010 |
| 7835709 | RF power transmission, modulation, and amplification using multiple input single output (MISO) amplifiers to process phase angle and magnitude information Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 11/16/2010 |
| 7805117 | Method and apparatus for minimizing noise in a transmitter A transmitter (200) includes a plurality of amplifier “n” stages (202, 204, 206) providing predetermined gain stages and a plurality of filters (208, 210). Each filter (208, 210) is distributed between each gain stage (202, 204... | 09/28/2010 |
| 7761068 | System and method for a time alignment analog notch System and method for creating a time alignment analog notch. An embodiment includes a digital power amplifier coupled to an enable signal line and to a digital control bits bus, and a matching network coupled to the digital power amplifier. The matching network to ... | 07/20/2010 |
| 7747231 | System and method for transmitting signal in a communication system A system and method for transmitting a signal in a communication system are provided. In the signal transmitting method, a multi-FA signal is generated by combining single FA signals to be transmitted by N FAs. An operation mode is determined for N MMPAs according t... | 06/29/2010 |
| 7684772 | Tuner for compensating for take-over point depending on temperature A tuner down-converts a Radio Frequency (RF) wireless signal and outputs the converted signal. The tuner compensates for a TOP depending on a temperature and: detects a received signal strength depending on a RF output of the tuner and transmitting the detected stre... | 03/23/2010 |
| 7672650 | Systems and methods of RF power transmission, modulation, and amplification, including multiple input single output (MISO) amplifier embodiments comprising harmonic control circuitry Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 03/02/2010 |
| 7634240 | Method and apparatus for controlling a supply voltage to a power amplifier A supply voltage to a power amplifier is controlled. A signal at a single point in a power amplifier is detected. A signal parameter is determined for the detected signal. The signal parameter is compared to at least one predetermined limit. This comparison result i... | 12/15/2009 |
| 7616931 | System and method for reducing phase distortion in a linear transmitter The invention decreases phase distortion in a transmitter by balancing C load in the power amplifier input such that a PGA won't have phase distortion. ... | 11/10/2009 |
| 7616932 | Multi-channel amplifier with reduced overall power emission, and circuit management including same A multi-channel amplifier has inputs via which input signals can be fed to the multi-channel amplifier. The input signals are amplified into output signals by amplifier channels of an amplification stage of the multi-channel amplifier and then are emitted via output... | 11/10/2009 |
| 7548733 | Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second no... | 06/16/2009 |
| 7548732 | Power amplifier arrangement having two or more antenna coupling respective amplifiers to a supply potential A power amplifier arrangement having a distributed antenna is disclosed. The power amplifier arrangement has two or more signal paths which are coupled to a common input. Each signal path has an amplifier with a downstream antenna. The respective signal paths with t... | 06/16/2009 |
| 7539468 | Communication terminal device and amplification circuit Power consumed by a power-variable amplifying unit for amplifying and supplying data to an antenna in a mobile telephone carrying out data transmission by changing transmission power in accordance with a TPC bit transmitted from a base transceiver station is reduced... | 05/26/2009 |
| 7526261 | RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 04/28/2009 |
| 7519337 | Transmitter and mobile communication terminal using the same A transmitter employing variable gain amplifiers and operating with both constant and nonconstant envelope modulation systems is contrived to suppress variation in the transmitting power when constant envelope modulation is performed. The transmitter comprises a PM ... | 04/14/2009 |
| 7515885 | Communications signal amplifiers having independent power control and amplitude modulation The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelop... | 04/07/2009 |
| 7499682 | Dual voltage regulator for a supply voltage controlled power amplifier in a closed power control loop A supply voltage controlled power amplifier that comprises a power amplifier, a closed power control feedback loop configured to generate a power control signal, and a dual voltage regulator coupled to the power control feedback loop, the dual voltage regulator comp... | 03/03/2009 |
| 7444125 | Communications signal amplifiers having independent power control and amplitude modulation The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelop... | 10/28/2008 |
| 7444124 | Adjustable segmented power amplifier An architecture, circuits, systems and a method for amplifying an analog signal. The architecture and/or circuit generally includes a first fixed stage (e.g., a predriver) and an adjustable stage. The first fixed stage may be configured to amplify an analog signal a... | 10/28/2008 |
| 7440488 | TDMA, spread spectrum RF agile filtered signal transmission Communication and broadcast system for Time Division Multiple Access (TDMA), spread spectrum, filtered signal and cross-correlated in-phase and quadrature-phase baseband signals for Radio Frequency (RF) tunable or RF agile transmitters. A selector and connection dev... | 10/21/2008 |
| 7433656 | Reducing flicker noise in two-stage amplifiers A multi-stage amplifier includes first and second amplification stages and a loading stage, all of which generate flicker noise. A degeneration block is operably disposed between circuit common and the loading stage wherein the degeneration block is operable to redu... | 10/07/2008 |
| 7421256 | Low noise switching voltage regulator A low-noise switching voltage regulator for supplying a voltage to a radio frequency (RF) power amplifier is disclosed. In one embodiment, the invention can be conceptualized as a power amplifier supply circuit, comprising a pair of oppositely polarized semiconducto... | 09/02/2008 |
| 7418244 | Radio transmitter with accurate power control A radio transmission power control circuit includes a radio frequency (rf) downconverter that produces a downconverter output representative of the difference between a first downconverter input based on a transmitted signal of a radio transmitter and a second downc... | 08/26/2008 |
| 7415066 | Mis-matched modulation-demodulation format selectable filters Modulation-demodulation format selectable (MFS) processor, cross-correlator and transmit filter for processing, cross-correlating and filtering in-phase and quadrature-phase baseband signal and providing a first bit rate and a second bit rate baseband signal to a mo... | 08/19/2008 |
| 7409196 | RFIC transmit power control An RFIC transmitter includes a digital transmit processing module, a digital to analog converter, a filter and gain module, an up-conversion module, a power amplifier, and a transmit signal strength module. The transmit signal strength module is coupled to generate ... | 08/05/2008 |
| 7409189 | Calibration and testing architecture for receivers A method and apparatus are provided to generate calibration signals to multiple stages in a receiver channel. The multiple stages are calibrated using multiple calibration circuits, where a controller controls each calibration circuit. The controller is coupled to t... | 08/05/2008 |
| 7395038 | High-efficiency modulating RF amplifier The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequ... | 07/01/2008 |
