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Class Information
Number: 330/251
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including class d amplifier
Description: Subject matter including an amplifier which utilizes switching-mode techniques.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8710922 Method and apparatus for filter-less class D audio amplifier EMI reduction Apr. 29, 2014
8705773 Audio amplifier Apr. 22, 2014
8686789 Transient signal suppression for a class-D audio amplifier arrangement Apr. 1, 2014
8674763 Multi-autonomous electronic amplifier Mar. 18, 2014
8669809 Differential output inductor for class D amplifier Mar. 11, 2014
8665025 Push-pull amplification systems and methods Mar. 4, 2014
8660276 Driving circuit for a sound outputting apparatus Feb. 25, 2014
8659351 Electronic circuit for driving a switching amplifier Feb. 25, 2014
8649528 Microphone unit with internal A/D converter Feb. 11, 2014
8643436 Multi-level boosted Class D amplifier Feb. 4, 2014
8638169 Power supply method and apparatus Jan. 28, 2014
8639193 Tri-state control for a line driver Jan. 28, 2014
8618875 Using a new synchronization scheme for a multi-channel class-D amplifier Dec. 31, 2013
8618881 Class-D power amplifier Dec. 31, 2013
8610501 Class resonant-H electrosurgical generators Dec. 17, 2013
8610184 Semiconductor integrated circuit device Dec. 17, 2013
8593220 Power MOSFETs with improved efficiency for multi-channel class D audio amplifiers and packaging therefor Nov. 26, 2013
8587372 Multi-input differential amplifier and light emitting element driving device Nov. 19, 2013
8576003 Cascaded class D amplifier with improved linearity Nov. 5, 2013
8565342 Power amplification apparatus, OFDM modulation apparatus, wireless transmission apparatus, and distortion reduction method for power amplification apparatus Oct. 22, 2013
8558618 Versatile audio power amplifier Oct. 15, 2013
8558609 Amplification systems and methods with noise reductions Oct. 15, 2013
8553909 Low-power class D amplifier using multistate analog feedback loops Oct. 8, 2013
8536938 Output circuits with class D amplifier Sep. 17, 2013
8526640 Apparatus and method for switching audio amplification Sep. 3, 2013
8525587 Switching amplifier with inductance means for transmitting energy Sep. 3, 2013
8525593 Circuit and method for amplifying a digital signal Sep. 3, 2013
8519791 Free-fly class D power amplifier Aug. 27, 2013
8519877 Low noise and low power arrangement for playing audio signals Aug. 27, 2013
8508298 Amplifier using master-slave control scheme Aug. 13, 2013
8502602 Class-D amplifier circuit Aug. 6, 2013
8502601 Integrated circuit Aug. 6, 2013
8493145 Switching power amplifier for quantized signals Jul. 23, 2013
8493146 Amplifier using fast discharging reference Jul. 23, 2013
8482346 High efficiency balanced output amplifier system Jul. 9, 2013
8482350 Low RF interference switching amplifier and method Jul. 9, 2013
8471627 Cross current minimization Jun. 25, 2013
8472643 Power amplifier and method for restraining power of improved power amplifier Jun. 25, 2013
8466743 Ground-referenced common-mode amplifier circuit and related method Jun. 18, 2013
8462960 Signal processing system having a plurality of high-voltage functional blocks integrated into interface module and method thereof Jun. 11, 2013
8457192 Pulse width modulator Jun. 4, 2013
8451056 Apparatus for outputting symmetrical signal and amplifier circuit May. 28, 2013
8451057 Switching amplifier using inductor current feedback May. 28, 2013
8446221 Electronic circuit with a linear amplifier assisted by a switch-mode amplifier May. 21, 2013
8447046 Circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system May. 21, 2013
8441317 Tapered-impedance distributed switching power amplifier May. 14, 2013
8441316 Switching supply circuits and methods May. 14, 2013
8432221 Switching amplifying method and switching amplifier Apr. 30, 2013
8433078 High perceived audio quality class D amplifier Apr. 30, 2013
8427235 Power-MOSFETs with improved efficiency for multi-channel class-D audio amplifiers and packaging thereof Apr. 23, 2013

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