Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1981-02-02
1983-06-21
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
330289, H03F 304
Patent
active
043896197
ABSTRACT:
A current amplifier comprises four like-conductivity transistors on a substrate of an integrated circuit with a first pair connected in current mirror amplifier configuration. The third and fourth transistors have their respective bases cross-coupled to the other's collector, and their respective collector-emitter paths interposed serially between the respective emitters of the first and third transistors and a common terminal. Adjustable resistances external to the substrate are serially interposed between the emitters of the third and fourth transistors and the common terminal for adjusting the current gain of the current amplifier.
REFERENCES:
patent: 3835410 (1974-09-01), Wittlinger
patent: 3873933 (1975-03-01), Wheatley, Jr.
patent: 3887863 (1975-06-01), Brokaw
patent: 3930172 (1975-12-01), Dobkin
patent: 4137506 (1979-01-01), Iwamatsu et al.
patent: 4243948 (1981-01-01), Schade, Jr.
patent: 4268759 (1981-05-01), Gilbert
S. Pookaiyaudom et al., "Precise Wide-Dynamic Range Constant Current Ratio Circuits", Proceedings of the IEEE, vol. 65, No. 10, Oct. 1977, pp. 1514-1515.
B. Gilbert et al., "A Wideband Two-Quadrant Analog Multiplier", Digest of Technical Papers, 1980 IEEE International Solid-State Circuits Conference, Feb. 1980, FAM 15.3, pp. 200-201.
Berard, Jr. C. A.
Mullins James B.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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