Novel technique for frequency detection utilizing switching filt

Details Novel technique for frequency detection utilizing switching filt Novel technique for frequency detection utilizing switching filt

1975-02-19

1976-10-12

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 77CS, 324 78Q, G01R 2302

Patent

active

039861120

ABSTRACT:
A frequency detection device adapted to detect in which of a plurality of frequency bands an input signal occurs comprises band pass filter means for selecting from the input signal the output signals in each of the bands and detecting means responsive to said output signals to stop the scanning action of the scanning means wherein the band pass filter means comprises a band pass filter and means for scanning the filter through different bands in turn, and an indicator actuated by the stopping of the scanning action to indicate the frequency band in which the input signal has occurred.

REFERENCES:
patent: 3327210 (1967-06-01), Wu
patent: 3638037 (1972-01-01), McMurtrie

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