Communications: electrical – Digital comparator systems
Patent
1975-03-10
1977-02-01
Yusko, Donald J.
Communications: electrical
Digital comparator systems
3401461BA, 340167A, 340171R, H04Q 916, G06F 1100
Patent
active
040064620
ABSTRACT:
A wireless remote control system has a transducer coupled to a sampling first counter for counting the frequency of incoming signals. A portion of the count distinguishes among various control signal frequencies and is supplied to a memory and a comparator. A second counter counts the number of identical comparisons of present and immediately preceding measurements, and is reset when a non-identical comparison is detected. The memory supplies the stored portion of the count to a decoder which is disabled by the second counter until a predetermined number of identical frequency comparisons have been determined, which provides noise immunity. The decoder is coupled to utilization means to activate the control function corresponding to the frequency of the control signal.
REFERENCES:
patent: 3611297 (1971-10-01), Kramer et al.
patent: 3705363 (1972-12-01), Okada et al.
patent: 3836959 (1974-09-01), Pao et al.
patent: 3852722 (1974-12-01), Neuville
patent: 3855575 (1974-12-01), Leuschner et al.
patent: 3858116 (1974-12-01), Friedl et al.
patent: 3944982 (1976-03-01), Mogi et al.
Collins Johnny
Podowski Robert R.
Camasto Nicholas A.
Yusko Donald J.
Zenith Radio Corporation
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