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Class Information
Number: 330/2
Name: Amplifiers > With amplifier condition indicating or testing means
Description: Subject matter involving means or methods of testing amplifiers as set forth in the class definition and/or amplifiers as set forth in the class definition combined with indicating means to show a condition of the amplifier.

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8655292 Amplifier circuit, transmitter, and method of controlling amplifier circuit Feb. 18, 2014
8502601 Integrated circuit Aug. 6, 2013
8447050 Thermal feedback for switch mode amplification May. 21, 2013
8358169 Systems and methods for distortion measurement using distortion-to-amplitude transformations Jan. 22, 2013
8319549 Self-healing power amplifier: methods and apparatus Nov. 27, 2012
8294514 Calibrate output matching for correct output power Oct. 23, 2012
8258759 Anti-islanding for grid-tie inverter using covariance estimation and logic decision maker Sep. 4, 2012
8219336 Arrangement for determining the operational parameters of a high-frequency power amplifier Jul. 10, 2012
8169260 Amplifier circuit utilizing characteristic correction and smooth curvilinear correction May. 1, 2012
8155351 Sound signal output device and program for controlling sound output Apr. 10, 2012
8143881 Current measuring apparatus for power supply Mar. 27, 2012
8130032 Systems and methods for high-sensitivity detection of input bias current Mar. 6, 2012
8130735 Method and system for a software defined power amplifier for multi-band, multi-standard applications Mar. 6, 2012
8120421 Circuit structure free from test effect and testing method thereof Feb. 21, 2012
8050418 Update system for an audio amplifier Nov. 1, 2011
8040179 Apparatus and method for estimating power for amplifier Oct. 18, 2011
8022755 Amplifier with automatic gain profile control and calibration Sep. 20, 2011
7977618 Testing of transimpedance amplifiers Jul. 12, 2011
7965136 Multiport amplifier adjustment Jun. 21, 2011
7949365 Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same May. 24, 2011
7932776 RF power transmission, modulation, and amplification embodiments Apr. 26, 2011
7912430 Circuit arrangement for wirelessly exchanging data and RFID chip card device Mar. 22, 2011
7885797 Method for production of a system for representation of an electrical network, and use of the method Feb. 8, 2011
7863975 Method for calibrating a power amplifier and device using the same Jan. 4, 2011
7859330 Optimized uplink efficiencies for transmission of satellite data Dec. 28, 2010
7856048 On-chip IQ imbalance and LO leakage calibration for transceivers Dec. 21, 2010
7848451 Digital pre-distortion technique using nonlinear filters Dec. 7, 2010
7840015 Thermal feedback for switch mode amplification Nov. 23, 2010
7826810 Multiband radio with transmitter output power optimization Nov. 2, 2010
7809081 Digital pre-distortion technique using nonlinear filters Oct. 5, 2010
7804356 Amplifier with automatic gain profile control and calibration Sep. 28, 2010
7783062 Automatic audio distortion control method and apparatus Aug. 24, 2010
7772922 Method and system for testing data signal amplifier having output signal power dependent upon multiple power control parameters Aug. 10, 2010
7772923 Test circuit for programmable gain amplifier Aug. 10, 2010
7642845 Circuit for creating tracking transconductors of different types Jan. 5, 2010
7639082 System and method for amplifier gain measurement and compensation Dec. 29, 2009
7639072 Controlling a power amplifier to transition among amplifier operational classes according to at least an output signal waveform trajectory Dec. 29, 2009
7639077 Method and apparatus for pre-conditioning an electrical signal Dec. 29, 2009
7636013 Method and integrated circuit including an amplifier calibration circuit Dec. 22, 2009
7606322 Digital pre-distortion technique using nonlinear filters Oct. 20, 2009
7606324 Digital pre-distortion technique using non-linear filters Oct. 20, 2009
7599418 Method and apparatus for a frequency hopper Oct. 6, 2009
7545156 Test circuit and test method that includes supplying a current to a plurality of light-receiving elements Jun. 9, 2009
7545206 Apparatus for and method of biasing a transistor Jun. 9, 2009
7535292 Optimized uplink efficiencies for transmission of satellite data May. 19, 2009
7528649 Method for designing input circuitry for transistor power amplifier May. 5, 2009
7529523 N-th order curve fit for power calibration in a mobile terminal May. 5, 2009
7521936 Diagnostic system for power converter Apr. 21, 2009
7489186 Current sense amplifier for voltage converter Feb. 10, 2009
7486067 Real-time device characterization and analysis Feb. 3, 2009

1 2 3 4 5 6 7

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