Amplifier circuit

Details Amplifier circuit Amplifier circuit

1977-04-19

1979-06-12

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330199, 330296, H03F 304

Patent

active

041581792

ABSTRACT:
An amplifier circuit having an input adapted to receive a signal to be amplified from a signal source, at least two sets of combined amplifying transistors and associated power sources for the amplifying transistors, the two sets constituting first and second amplifying stages, a switching transistor for automatically switching the amplifying operation of the amplifier circuit from the first amplifying stage to the second amplifying stage depending upon the amplitude of the input signal to the amplifier and a load to which the amplifying transistors are connected in parallel.

REFERENCES:
patent: 3320551 (1967-05-01), Miller
patent: 3577092 (1971-05-01), Kubicz
patent: 3596199 (1971-07-01), Hafler
patent: 3961280 (1976-06-01), Sampei
patent: 3968451 (1976-07-01), Kamimura et al.

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