Negative feedback amplifier for driving capacitive load

Details Negative feedback amplifier for driving capacitive load Negative feedback amplifier for driving capacitive load

1992-02-26

1992-10-27

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330265, H03F 345

Patent

active

051592860

ABSTRACT:
A negative feedback amplifier including, in an input stage, a common-emitter first transistor and a common-base second transistor for supplying a quiescent collector current (standing current) to the first transistor so that a sufficient standing current flows. A negative feedback circuit is connected between an output terminal of an output stage and the emitter of the second transistor, and a first limiter diode is parallely connected to the feedback circuit so as to prevent saturation of an NPN transistor of the output stage. The common-base transistor in the input stage makes it possible to select a high resistance resistor as a feedback resistor, thus enabling the standing current of the output stage to be reduced. A second limiter diode may be connected between the output terminal and the input terminal of the output stage.

REFERENCES:
patent: 3036274 (1962-05-01), Greatbatch
patent: 3182269 (1965-05-01), Smith
patent: 3260947 (1966-07-01), Dorsman
patent: 3327235 (1967-06-01), Hull
patent: 3399357 (1968-08-01), Weilerstein
patent: 3419809 (1968-12-01), Lach et al.
patent: 3496480 (1970-02-01), Singletary, Jr.
patent: 3922585 (1975-11-01), Andrews
patent: 4728903 (1988-03-01), Reiffin
I.B.M. Technical Disclosure Bulletin, vol. 10, No. 8, Jan. 1968 pp. 1148-1149.

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