Amplifier with extended output drive capability

Details Amplifier with extended output drive capability Amplifier with extended output drive capability

1984-08-24

1986-05-13

Laroche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330263, 330288, H03F 326

Patent

active

045889619

ABSTRACT:
An operational amplifier is provided with at least one output supplementary stage and current mirror amplifiers for coupling amplified signal current variations to drive supplementary output stage source and sink transistors. Those transistors have their internal collector-emitter paths directly connected between supply rails and perform further amplification of the signals. A current source circuit is employed for so limiting those signal current variations that, after the further amplification, circuit devices will not be damaged.

REFERENCES:
patent: 3952257 (1976-04-01), Schade, Jr.
patent: 4380740 (1983-04-01), Kaplan
patent: 4394625 (1983-07-01), Sakai
patent: 4410857 (1983-10-01), Olmstead
patent: 4454479 (1984-06-01), Spires
U.S. Patent Application entitled "Operational Amplifier with Improved Output Capability," D. A. Spires, Ser. No. 451,024, filed Dec. 20, 1982.

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