Pulse-frequency sensitive switching circuit arrangement

Details Pulse-frequency sensitive switching circuit arrangement Pulse-frequency sensitive switching circuit arrangement

1975-01-03

1976-08-24

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328140, 307247R, H03B 304

Patent

active

039769488

ABSTRACT:
A frequency sensitive switching arrangement is arranged to cause a bistable switching arrangement to produce an output signal at a first or second level depending whether the pulse rate is below a lower rate or above a higher rate with hysteresis preventing change of level between the rates. The bistable switch is arranged to give an output signal at a first or second level in dependence on whether an input pulse is applied to a first or second input. A first monostable element having a first preset unstable period opens a gate to permit pulses to be applied to the second input for the first unstable period and a second monostable element having a second preset unstable period, longer than the first, closes a gate to prevent pulses from being applied to the first input terminal for the second unstable period. Any input pulses occurring between the end of first and second periods is not applied to either terminal and the output level remains as previously. A reset arrangement may be provided to return the output to the low pulse rate state in the event of a sudden cessation of input pulses.

REFERENCES:
patent: 3413490 (1968-11-01), Breunig et al.
patent: 3466550 (1969-09-01), Wolf et al.
patent: 3474341 (1969-10-01), Crafts et al.
patent: 3521174 (1970-07-01), Naubereit et al.
patent: 3763435 (1973-10-01), Holman
patent: 3882545 (1975-05-01), Titus

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