Push-pull amplifier circuit with stable class AB operation

Details Push-pull amplifier circuit with stable class AB operation Push-pull amplifier circuit with stable class AB operation

1985-02-27

1986-08-19

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330255, 330268, H03F 326

Patent

active

046072330

ABSTRACT:
To obtain class AB operation of a push-pull amplifier which uses a preamplifier and an output amplifier having complementary output transistors, the base-emitter voltage of the first output transistor is converted into a current by a voltage-to-current converter and this current is re-converted into a base-emitter voltage by a current-to-voltage converter and added to the base-emitter voltage of the second output transistor. The sum of said base-emitter voltages is maintained equal to a reference voltage generated across two diode-connected transistors (T.sub.7, T.sub.8) by a differential amplifier.

REFERENCES:
patent: 4366448 (1982-12-01), Kosakabe et al.

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