Push-pull amplifier having bootstrap capacitor isolation

Details Push-pull amplifier having bootstrap capacitor isolation Push-pull amplifier having bootstrap capacitor isolation

1992-12-23

1994-05-24

Mottola, Steven

Amplifiers

Bootstrap coupling

330267, H03F 326

Patent

active

053152638

ABSTRACT:
An audio power amplifier includes a stacked pair of complementary transistors having the emitters commonly coupled to a load. A driver stage couples the bases of the stacked pair to a source of audio frequency signal. A bootstrap capacitor is coupled between the commonly coupled output node and the supply voltage. An isolation diode is interposed between the bootstrap capacitor and the operating supply to prevent discharge of the bootstrap capacitor into the operating supply during positive signal swings.

REFERENCES:
patent: Re29273 (1977-06-01), Reiffin

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