Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
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
Davis B. P.
Gottlieb Paul A.
Hightower Judson R.
Miller Stanley D.
Rees Walter L.
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