Electrical audio signal processing systems and devices – Headphone circuits
Patent
1996-08-07
1998-07-28
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Headphone circuits
381121, 381 28, H04R 110
Patent
active
057871825
ABSTRACT:
The present invention resides in an audio amplifier circuit which includes an output terminal of an IC connected to a power amplifier circuit, a resistor having one end connected to a negative feedback input of the power amplifier circuit and the other end connected to a certain terminal other than the output terminal of the IC, a first capacitor connected between the output terminal and a loud speaker and a second capacitor connected between a wiring connecting the output terminal to the loud speaker and the certain terminal. A reduction of low frequency gain determined by a time constant of the first capacitor and an impedance of the loud speaker is corrected by an increase of of low frequency amplification gain determined by a time constant of the second capacitor and the resistor.
REFERENCES:
patent: 4649565 (1987-03-01), Kaizer et al.
patent: 5412733 (1995-05-01), Nagayoshi et al.
Fujisawa Masanori
Hoshino Taichi
Kobayashi Masato
Yamamoto Isao
Kuntz Curtis A.
Lee Ping W.
Rohm & Co., Ltd.
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