Active bias circuit for operating push-pull amplifiers in class

Details Active bias circuit for operating push-pull amplifiers in class Active bias circuit for operating push-pull amplifiers in class

1975-09-26

1976-11-30

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330 15, 330 18, 330 19, 330 22, 330 30D, 330 40, H03F 3183

Patent

active

039952282

ABSTRACT:
A transistor audio amplifier of the Class AB complementary symmetry type is biased with a new bias circuit to keep both transistors on during all normal signal conditions. The bias circuit includes a pair of series connected V.sub.BE Multipliers with an interconnection between the two multipliers receiving signal feedback from the amplifier output such that the Multipliers can bias both complementary transistors on for all normal signal operating conditions.

REFERENCES:
patent: 3536958 (1970-10-01), Sondermeyer
patent: 3866134 (1975-02-01), Higuchi et al.

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