Multiple amplifier interconnection for optimal sensitivity

Details Multiple amplifier interconnection for optimal sensitivity Multiple amplifier interconnection for optimal sensitivity

1982-04-19

1984-02-28

Mullins, James B.

Amplifiers

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

330124R, 330295, H03F 126, H03F 368

Patent

active

044344058

ABSTRACT:
To obtain optimal operational sensitivity from an amplifier connected to a source of electrical signals, a technique utilizes multiple amplifiers connected together. The technique determines the number, N, of amplifiers (31 or 51) to be used and whether they should be connected in parallel (FIG. 3) or series (FIG. 5) in order to optimize the sensitivity of a given type of amplifier. Accordingly, multiple interconnection of amplifiers may be used in lieu of noise matching with transformers to minimize the excess-noise figure of the multiple amplifier circuit. The technique capitalizes on the advances in integrated circuit amplifier design, such as compactness and wideband performance, while providing lower loss and higher reliability through redundancy.

REFERENCES:
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patent: 3477031 (1969-11-01), Nagata
patent: 4156859 (1979-05-01), Forward et al.
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patent: 4198612 (1980-04-01), Morton
patent: 4263561 (1981-04-01), Weber
patent: 4264871 (1981-04-01), Forward
Chapman, "Noise Cancelling Preamp", Elektor, vol. 3, No. 7-8, Jul./Aug. 1977, p. 58.
Grocock, "Low-Noise Wideband Amplifier", Wireless World, Mar. 1975, pp. 117, 118.
Rothe et al., "Theory of Noisy Fourpoles", Proceedings of the IRE , vol. 44, No. 6, pp. 811-818.

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