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Class Information
Number: 330/146
Name: Amplifiers > Wheatstone bridge with amplifier in at least one arm
Description: Subject matter wherein the four arms of a Wheatstone bridge comprise four impedances of the amplifier circuit in such manner that at least one of the four impedances of the bridge is the discharge path of the amplifying device.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8660277 Amplifier circuit and methods of operation thereof Feb. 25, 2014
8362839 Cross-differential amplifier Jan. 29, 2013
8330539 Dynamic switchable mode dual bridge power amplifier Dec. 11, 2012
8311243 Energy-efficient consumer device audio power output stage Nov. 13, 2012
7999621 Cross-differential amplifier Aug. 16, 2011
7813515 Multi-channel power amplifier with channels independently self-configuring to a bridge or single-ended output, particularly for audio applications Oct. 12, 2010
7782129 System and method to reduce audio artifacts from an audio signal by reducing the order of the control loop Aug. 24, 2010
7646249 Cross-differential amplifier Jan. 12, 2010
7609110 Filterless class-D speaker driver with less switching Oct. 27, 2009
7417394 Arrangement for testing a power output stage Aug. 26, 2008
7397305 High output power amplifier with adjustable voltage transformation ratio of transformer Jul. 8, 2008
7388434 BTL amplifier Jun. 17, 2008
7355472 Method and device for correcting signal distortions in an amplifier device Apr. 8, 2008
7307475 RF generator with voltage regulator Dec. 11, 2007
7307474 Integrated booster amplifier Dec. 11, 2007
7242244 Method and arrangement for testing a power output stage Jul. 10, 2007
7230482 Method of preventing abrupt voltage changes at the outputs of a pair of amplifiers and control circuit for a pair of amplifiers self-configuring in a bridge configuration Jun. 12, 2007
7187233 Floating bridge amplifier system Mar. 6, 2007
7116166 High fidelity, high power switched amplifier Oct. 3, 2006
7116168 Power multiplier system and method Oct. 3, 2006
7113032 Low distortion power amplifier and method of controlling a multi-channel power amplifier Sep. 26, 2006
7061311 Differential amplifier for dual bridge transducer Jun. 13, 2006
7024864 Bipolar current source based on a unipolar power supply Apr. 11, 2006
6919763 Transconductance amplifier for inductive loads and method for driving inductive loads Jul. 19, 2005
6809586 Digital switching power amplifier Oct. 26, 2004
6781445 Low power large signal RF tuned buffer amplifier Aug. 24, 2004
6756846 Increased output swing line drivers for operation at supply voltages that exceed the breakdown voltage of the integrated circuit technology Jun. 29, 2004
6747513 High fidelity floating bridge amplifier Jun. 8, 2004
6590447 Precision bridge amplifier Jul. 8, 2003
6577187 Powered transducer preamplifier with DC level shifting circuit Jun. 10, 2003
6552607 Time division multiplexed PWM amplifier Apr. 22, 2003
6396340 RF power amplifier system employing AC-DC power supplies and RF combining May. 28, 2002
6369650 Impedance synthesis and DC biasing method and architecture for DSL/cable line drivers Apr. 9, 2002
6353298 Low distortion audio range class-AB full H-bridge pre-driver amplifier Mar. 5, 2002
6351185 Increased output swing line drivers for operation at supply voltages that exceed the breakdown voltage of the integrated circuit technology Feb. 26, 2002
6307434 Circuit for ensuring full saturation of amplifiers of a single input configured bridge amplifier Oct. 23, 2001
6255907 Power amplifier Jul. 3, 2001
6242977 Amplifier and preamplifier circuit Jun. 5, 2001
6211728 Modulation scheme for filterless switching amplifiers Apr. 3, 2001
6211735 RF power amplifier having improved power supply for RF drive circuits Apr. 3, 2001
6204729 H-bridge power amplifier for a motor Mar. 20, 2001
6201480 Seat weight measuring apparatus Mar. 13, 2001
6177840 Circuit arrangement for amplifying a differential voltage signal which has a substantially temperature independent characteristic curve Jan. 23, 2001
6144258 Apparatus and method for amplifying an audio signal without reference to ground Nov. 7, 2000
6127888 Power amplification device Oct. 3, 2000
6107886 High-efficiency power amplifier Aug. 22, 2000
6078214 High efficiency class DB power amplifier Jun. 20, 2000
6046634 Amplifier circuit employing floating error cancellation Apr. 4, 2000
6025742 Low voltage differential swing driver circuit Feb. 15, 2000
6023193 High power bridge amplifier Feb. 8, 2000

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