H - Electricity – 04 – N
Patent
H - Electricity
04
N
328/164, 350/20
H04N 5/14 (2006.01) H04N 5/445 (2006.01)
Patent
CA 1175500
Abstract of the Disclosure A frequency-sensitive switching circuit includes a selectively- operable switch and a sampling circuit for controlling the switch. First and second signals are supplied to the switch. The first signal is also supplied to the sampling circuit, which senses the frequency of a series of pulses therein and compares such sensed pulse frequency with a set frequency. If the sensed pulse frequency is within the band width of the set frequency, the switch passes the first signal to an output terminal. If the sensed pulse frequency falls outside the band width of the set frequency, the switch passes the second signal to the output terminal.
417055
Smart & Biggar
Wny Hospital Television Inc.
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