Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Patent
1981-07-01
1984-02-21
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
330207R, H03H 304
Patent
active
044333064
ABSTRACT:
A BTL power amplifier comprises main and inverse amplifier units having the same constitution but producing outputs inverted from each other. A low impedance load is directly connected between the output ports of the main and inverse amplifier units. The present BTL power amplifier further comprises a first operation control circuit which activates only the main amplifier unit after the power switch is turned on, and a second operation control circuit which maintains the output port of the inverse amplifier unit in a floating state for a predetermined period of time after the activation of the main amplifier unit is begun. Thus, the present BTL power amplifier produces no pop noise when the power supply is initiated.
REFERENCES:
patent: 4330756 (1982-05-01), Moreau
Hanazawa Toshio
Handa Harumi
Honda Hideo
Sano Yoshiaki
Tsuchiya Chikara
Fujitsu Limited
Mullins James B.
Wan Gene
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