Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1980-03-26
1982-05-18
Tokar, Michael J.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330265, H03F 326
Patent
active
043307558
ABSTRACT:
A power-amplifying circuit includes a differential amplifier wherein the base of one of the transistors is supplied with an input signal and the collectors of both transistors are respectively supplied with signals amplified in the non-inverting form and the inverting form, two output transistors carrying out a push-pull operation upon receipt of output signals from both transistors of the differential amplifier, third and fourth transistors for detecting output currents from both transistors of the output transistors, and a circuit for supplying a current corresponding to a product of output currents from the first and second transistors to the differential amplifier through a negative feedback path. A compensation resistor is connected to one of the bases and emitters of the third and fourth transistors to counterbalance a parasitic resistance occurring in the first and second transistors.
REFERENCES:
patent: 2789164 (1957-04-01), Stanley
patent: 3434069 (1969-03-01), Jones
patent: 3904974 (1975-09-01), Fukaya
patent: 4041407 (1977-09-01), Main
patent: 4077012 (1978-02-01), Iwamatsu
Office Action from West Germany dated Nov. 5, 1980 (translation).
Search Report from the French Republic dated May 29, 1981 (translation).
J. H. Huijsing and Frans Tol "Monolithic Operational Amplifier Design with Improved HF Behavior," IEEE Journal of Solid-State Circuits, vol. SC-11, No. 2, Apr. 1976, pp. 323-328.
Ishii Takashi
Yamaguchi Hiroyasu
Tokar Michael J.
Tokyo Shibaura Denki Kabushiki Kaisha
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