Phase shift circuit for electrical signal

Details Phase shift circuit for electrical signal Phase shift circuit for electrical signal

1987-06-16

1988-11-01

Mullins, James B.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328155, 330260, 330305, 330306, 358 19, H03K 500

Patent

active

047822465

ABSTRACT:
A phase shift circuit comprises a variable phase shifter responsive to an externally supplied voltage to change the amount of phase shift, and a phase detector operative to detect a phase difference between input and output signals of the variable phase shifter and supply a voltage complying with the phase difference to the variable phase shifter. When the center frequency of the variable phase shifter is changed by reason of production errors and temperature variations to deviate the phase shift amount from a desired value, the phase detector controls the center frequency such that the phase shift amount can be fixed to the desirably predetermined value.

REFERENCES:
patent: 3436647 (1969-04-01), Gobeli et al.
patent: 4306198 (1981-12-01), Okada

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