Frequency selective filter circuit

Details Frequency selective filter circuit Frequency selective filter circuit

1984-06-25

1986-03-25

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Time domain filters

307520, 328167, 329126, 329128, H03D 306, H03D 318, H03H 1104

Patent

active

045786534

ABSTRACT:
A time domain filter having ideal high pass and low pass characteristics is provided by means of a one-shot monostable multivibrator and a flip-flop interconnected by means of an AND gate and an EXCLUSIVE-OR gate wherein the set time for the one-shot is equal to the half-period of the cut-off frequency. The time domain bandpass filter circuit having ideal bandpass filter characteristics comprises a pair of one-shot monostable multivibrators connected in cascade with each other and interconnected with a flip-flop by means of an AND gate. A further application of a modified time domain filter is that of time domain FM demodulator having an optional phase-locked loop.

REFERENCES:
patent: 2947945 (1960-08-01), Relis et al.
patent: 3566263 (1971-02-01), Meers, Jr.
patent: 3676699 (1972-07-01), Warren
patent: 3876951 (1975-04-01), McLean et al.

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