Voice frequency power amplifying circuit

The utility model relates to an audio power amplifier circuit comprising a power amplifier and a loudspeaker, which is characterized in that the sampling resistance R is connected in series in the loop of the loudspeaker to collect output signal, and a positive feedback circuit is built up by connec...

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Bibliographic Details
Main Authors YOUZHEN WU, JIANPING SONG
Format Patent
LanguageEnglish
Published 17.07.2002
Edition7
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary:The utility model relates to an audio power amplifier circuit comprising a power amplifier and a loudspeaker, which is characterized in that the sampling resistance R is connected in series in the loop of the loudspeaker to collect output signal, and a positive feedback circuit is built up by connecting a frequency equalizing circuit which consists of an active filter to the in-phase input end of the power amplifier. Through adjusting parameter values of the positive feedback circuit, the power amplifier can work in the magnifying state and the frequency characteristic curves can be adjusted thereof. The utility model can improve the transient response of the audio power amplifier circuit, increase the frequency response and decrease the distortion.
Bibliography:Application Number: CN2001266439U