Logarithmic amplifier utilizing positive feedback

Details Logarithmic amplifier utilizing positive feedback Logarithmic amplifier utilizing positive feedback

1981-05-18

1983-11-29

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307492, G06G 724

Patent

active

044183178

ABSTRACT:
A non-linear amplifier circuit that may be used to provide a logarithmic amplification characteristic. The circuit includes an amplification stage employing positive non-linear feedback for low level input signals to reduce the input capacitance of the amplifier. For large level input signals the feedback is eliminated.

REFERENCES:
patent: 3254304 (1966-05-01), Barret
patent: 3562550 (1971-02-01), Fein
patent: 3992622 (1976-11-01), Numata et al.
patent: 4236126 (1980-11-01), Weller et al.
patent: 4259641 (1981-03-01), Carow
patent: 4323798 (1982-04-01), Watkins

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