Frequency discrimination circuit

Details Frequency discrimination circuit Frequency discrimination circuit

1986-03-10

1988-08-09

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307234, 328134, 328141, H03K 906, H03D 302

Patent

active

047630256

ABSTRACT:
In a frequency discrimination circuit, a first retriggerable monostable multivibrator is triggered in response to the period of a signal to be measured to produce a first pulse output having a pulse width corresponding to the period of a reference frequency, and a second retriggerable monostable multivibrator produces a second pulse output having a pulse width wider than that of the first pulse output in response to a repetitive pulse signal which has a constant period smaller than the pulse width of the first pulse output and is generated only when the first pulse output is not produced, whereby it is possible to discriminate whether or not the frequency of the signal to be measured is higher than the reference frequency with high response characteristics.

REFERENCES:
patent: 3593161 (1971-07-01), Ritz
patent: 4318047 (1982-03-01), Dawson
Beattie, "Simple Pulse Width Checking Circuit", Electronic Engineering, vol. 52, No. 643, Oct. 1980, p. 31.

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