Circuit for normalizing devices having current-controlled freque

Details Circuit for normalizing devices having current-controlled freque Circuit for normalizing devices having current-controlled freque

1977-08-01

1979-05-08

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307297, 331177R, 330 85, 330112, 330291, H03K 102

Patent

active

041538498

ABSTRACT:
Circuits are disclosed for normalizing a device which has a current-controlled frequency response, such as a YIG or a TWM device, to a predetermined current-frequency (I-F) characteristic in order that a device equipped with such a circuit can be preadjusted for substitution in a system for a like device without realigning the system. The normalizing circuit is in parallel with the device, and is comprised of a transistor and a compensating current-sensing resistor in series with the transistor. A shunt compensating current, I.sub.C, through the transistor is set by a voltage on a potentiometer to offset the I-F characteristic of the composite device and circuit from that of the device to a predetermined level and also by a feedback control circuit connected to the compensating current-sensing resistor. The slope of the offset characteristic is then adjusted to a predetermined value by adjusting the gain of a feedback control circuit between the transistor and a resistor which senses a voltage, V.sub.S, proportional to the current, I.sub.T, which is the sum of the drive current, I.sub.Y, through the device and the shunted compensating current, I.sub.C, through the transistor.

REFERENCES:
patent: 3259833 (1966-07-01), Barter
patent: 3783409 (1974-01-01), Polson
patent: 3869674 (1975-03-01), Borbely
patent: 3936675 (1976-02-01), Yoshida

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