FSK Data operated switch

Details FSK Data operated switch FSK Data operated switch

1982-03-18

1984-01-31

Ng, Jin F.

Pulse or digital communications

Repeaters

Testing

375 88, 375104, 307350, 328146, H04L 2714

Patent

active

044294042

ABSTRACT:
A circuit for detecting data such as FSK data which is not amplitude modulated. The circuit employs detectors for detecting the frequency domain characteristics, time domain characteristics and amplitude characteristics of the data signals so that a precise indication of the presence or absence of such data signals can be made. Further provided is a threshold control circuit which can override the indication of the presence or absence of data signals irrespective of whether such signals are in fact present or absent.

REFERENCES:
patent: 3214700 (1965-10-01), Hook
patent: 3769591 (1973-10-01), Brown et al.
patent: 3999083 (1976-12-01), Bumgardner
patent: 4157509 (1979-06-01), Zielinski

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