Circuit to achieve low noise figure

Details Circuit to achieve low noise figure Circuit to achieve low noise figure

1975-01-20

1976-08-03

Rolinec, R. V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 21, H03F 304

Patent

active

039732142

ABSTRACT:
A circuit comprising the first stage of a multi-stage amplifier is described, incorporating a plurality of networks connected between the input stage transistor emitter and ground. The networks are connected in parallel; each comprises a series resonant circuit, the resonant frequencies and component values of which have been chosen to provide wideband impedance-matching to the base of the transistor while achieving a low noise figure.

REFERENCES:
patent: 3160824 (1964-12-01), Stair
patent: 3581122 (1971-05-01), Gaunt, Jr.

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