Frequency-independent phase compensation circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307262, 307521, 328155, H03H 1120

Patent

active

046212094

ABSTRACT:
A phase compensation circuit for use in an automatic control system is disclosed. An input terminal is connected via a first adder, a signal line and a second adder to an output terminal, a series circuit of a variable resistor and a capacitor is connected between the signal line and ground potential, a voltage at a junction between the resistor and capacitor is fed back to the first adder via a first active circuit having an amplification of (1-.beta.) and fed forward to the second adder via a second active circuit having an amplification of (.alpha.-1). When the amplifications (1-.beta.) and (.alpha.-1) of the first and second active circuits are adjusted under the condition of .alpha..beta.=1, a phase angle of a phase-frequency characteristic at a center frequency can be directly controlled, and when the variable resistor is adjusted, the center frequency can be controlled independently from the phase angle.

REFERENCES:
patent: 3322970 (1967-05-01), Batteau
patent: 3601708 (1971-08-01), Stempler et al.
patent: 4032857 (1977-06-01), Lum
patent: 4087737 (1978-05-01), De Gennaro
patent: 4232399 (1980-11-01), Heiter
patent: 4341999 (1982-07-01), Rudish et al.
patent: 4521702 (1985-06-01), Kleinberg

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