Multi-stage power amplifier for audio frequencies

Details Multi-stage power amplifier for audio frequencies Multi-stage power amplifier for audio frequencies

2005-04-19

2005-04-19

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

C330S267000, C330S311000

Reexamination Certificate

active

06882225

ABSTRACT:
The invention concerns a power amplifier consisting of three stages: a first feedback-free stage amplifying the input signal in current; a second stage amplifying in voltage the signal output from the first stage and comprising two direct current feedback half-circuits symmetrically implanted and operating over the whole frequency spectrum; a third feedback-free stage amplifying the current derived from the second stage and powering a loudspeaker.

REFERENCES:
patent: 4216437 (1980-08-01), Sakaida
patent: 4833423 (1989-05-01), Molloy
patent: 5512859 (1996-04-01), Moraveji
patent: 6552613 (2003-04-01), Murray et al.
patent: 0 673 111 (1995-09-01), None

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