Rate controlled noise filter

Details Rate controlled noise filter Rate controlled noise filter

1991-09-23

1993-08-03

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, H03B 100, H03K 500

Patent

active

052332454

ABSTRACT:
A rate controlled noise filter according to the present invention comprises a transient detector adapted to receive an input signal and detect the rate at which the input signal is changing. The transient detector may be, for example, a filter having a second order filtered rate. The output of the transient detector is input to a function generator which outputs a signal indicative of the rate of change of the input signal. A noise filter, including a controllable time constant, also filters the input signal. The output of the function generator controls the time constant of the noise filter.

REFERENCES:
patent: 4322641 (1982-03-01), Packard
patent: 4667120 (1987-05-01), Okada et al.
patent: 4954732 (1990-09-01), Surauer et al.

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