Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1982-03-31
1984-08-07
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330133, 330278, H03G 330
Patent
active
044646330
ABSTRACT:
A pair of differential amplifier stages are connected in cascade to form a multistage amplifier for signal amplification purposes. The base-emitter paths of current source transistors which establish the operating currents for the respective stages are connected in series across a common source of forward bias voltage. The collector-emitter path of an additional transistor is shunted across the base-emitter path of one of the current source transistors. As biasing of the additional transistor is varied, the distribution of gain between the respective cascaded stages is altered substantially without disturbance of the overall gain of the multistage amplifier.
REFERENCES:
patent: 3676789 (1972-07-01), Bray
patent: 4051519 (1977-09-01), Harwood
Davis, Industrial Electronics: Design and Application, published 1973 by Bell and Howell Co., p. 207.
Millman et al., Integrated Electronics: Analog and Digital Circuits and Systems, published 1972 by McGraw-Hill Co., p. 515.
Harwood Leopold A.
Shanley, II Robert L.
Meagher William H.
Mullins James B.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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