Absolute-value circuit

Details Absolute-value circuit Absolute-value circuit

1975-07-03

1976-11-02

Goldberg, Gerald

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307313, 323 1, 330 30D, H02M 721

Patent

active

039899977

ABSTRACT:
The circuit comprises three current mirrors, the first and second having at least two output current paths and the third, one output current path. The first mirror is complementary to the second and supplies its output currents to the second. The signal current is applied to the second mirror and affects the output currents of the second mirror. The third mirror has an input circuit which serves as a shunt path for one of the output currents supplied by the first mirror in excess of that which the second mirror can accept and an output circuit which, under the same conditions, receives a portion of the second output current supplied by the first mirror. The load, through which flows a current which has the absolute value of the signal current, is coupled to the output terminal of the third mirror.

REFERENCES:
patent: 3564389 (1971-02-01), Richman
patent: 3876955 (1975-04-01), Ahmed
RCA Tech Notes TN No. 913, Aug, 24, 1972, "Transformerless Full-wave Rectifier" by Wheatley, Jr., two pages.

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