Log amplifier with pole-zero compensation

Details Log amplifier with pole-zero compensation Log amplifier with pole-zero compensation

1985-02-08

1987-01-06

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307491, 307492, G06G 724, G06F 7556

Patent

active

046349863

ABSTRACT:
A logarithmic amplifier circuit provides pole-zero compensation for improved stability and response time over 6-8 decades of input signal frequency. The amplifier circuit includes a first operational amplifier with a first feedback loop which includes a second, inverting operational amplifier in a second feedback loop. The compensated output signal is provided by the second operational amplifier with the log elements, i.e., resistors, and the compensating capacitors in each of the feedback loops having equal values so that each break point or pole is offset by a compensating break point or zero.

REFERENCES:
patent: 3037129 (1962-05-01), LeBel
patent: 3237028 (1966-02-01), Gibbons
patent: 3252007 (1966-05-01), Saari
patent: 3392287 (1968-07-01), McFadyen et al.
patent: 3448289 (1969-06-01), Harris
patent: 3584232 (1971-06-01), Wallace, Jr.
patent: 4147989 (1979-04-01), Brolde
patent: 4341962 (1982-07-01), Buff
patent: 4434380 (1984-02-01), Welland

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