Time constant automatic adjustment circuit for a filter circuit

Details Time constant automatic adjustment circuit for a filter circuit Time constant automatic adjustment circuit for a filter circuit

1987-07-17

1989-04-04

Laroche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307526, H03K 320

Patent

active

048189030

ABSTRACT:
An automatic adjustment circuit for adjusting the time constant of a filter circuit. The adjustment circuit includes a source of reference frequency signal, an oscillator for generating an oscillation signal, and a detector for detecting the difference in one of phase and frequency between the reference frequency signal and the oscillation signal and generating a control signal for automatically adjusting the time constant of the filter circuit.

REFERENCES:
patent: 4257018 (1981-03-01), Masdea et al.
patent: 4667120 (1987-05-01), Okada et al.
Moulding et al., "Gyrator Video Filter IC with Automatic Tuning," The Institute of Electrical and Electronic Engineers Journal of Solid-State Circuits, vol. SC-15, No. 6, pp. 963-967, Dec. 1980.

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