US Patent 7973598 Audio power amplifier and a pre-amplifier thereof
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Patent abstract
An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM signal by comparing a reference signal and an amplified audio signal. The bridge circuit has switches controlled according to the PWM signal such that a driving current alternately flows to and from a load. The feedback circuit generates the feedback signal indicating a condition of the load.
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Patent Inventor Names
Kuan-Jen Tseng0
Po-Yu Li0
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US Patent 07973598 Audio power amplifier and a pre-amplifier thereof US Patent 7973598 Audio power amplifier and a pre-amplifier thereof
Infobox
Patent Number
079735980
Patent Number
79735980
Edits on 23 Sep, 2022
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Infobox
Is a
Patent Jurisdiction
Patent Number
079735980
Date of Patent
July 5, 2011
0Patent Application Number
126903800
Date Filed
January 20, 2010
0Patent Primary Examiner
Edits on 8 Dec, 2021
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US Patent 07973598 Audio power amplifier and a pre-amplifier thereof
Infobox
Is a
Patent jurisdiction
Patent number
07973598
Date of patent
July 5, 2011
Patent application number
12690380
Date Filed
January 20, 2010
Patent primary examiner
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