Method of and apparatus for low noise current amplification

Details Method of and apparatus for low noise current amplification Method of and apparatus for low noise current amplification

1983-12-22

1986-03-18

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330257, 330261, 330293, 330295, 360 67, H03F 126

Patent

active

045771600

ABSTRACT:
This disclosure is concerned with novel techniques and circuit configurations for rendering high gain operational amplifiers and related differencing amplifiers adaptable for use with very low impedance signal sources to permit amplification of low-power signals with ultra-low noise, high D. C. stability, high gain, and wide frequency response, through development of the signal current as a very small increment on a much larger pre-existing current forced in opposite directions through an electronic switching device connected to such amplifier and producing minimal uncorrelated noise therein.

REFERENCES:
patent: 2760007 (1956-08-01), Lozier
patent: 3317681 (1967-05-01), Guisinger
patent: 3585315 (1971-06-01), Shaifer
patent: 4147992 (1979-04-01), Davis
patent: 4470020 (1984-09-01), Mohr
Foord, A., "Introduction to Low-Noise Amplifier Design", Wireless World, Apr. 1981, pp. 71-73.

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