Communications: electrical – Digital comparator systems
Patent
1976-04-30
1977-10-04
Pitts, Harold I.
Communications: electrical
Digital comparator systems
340171R, 325391, H04B 106
Patent
active
040527000
ABSTRACT:
A remote control receiver for producing different control signals in response to operating signals of respectively different frequencies. The receiver includes operating signal frequency counter which counts operating frequency oscillations in repeated counting cycles and produces an output signal when a predetermined count has been reached. The output signal controls a reference frequency counter which counts the number of reference frequency oscillations in each counting cycle. The count of the reference frequency counter reached during each counting cycle is stored and at the end of each counting cycle, a comparator compares the current count of the reference frequency counter with the stored count. The comparator produces a signal indicating agreement or non-agreement of the compared counts. An error register accepts every comparison result and passes a control signal to the receiver output associated with the particular operating signal being received, only when a predetermined number of agreements has been reached.
REFERENCES:
patent: 3523278 (1970-08-01), Hinkel
patent: 3737577 (1973-06-01), Birkin
patent: 3863215 (1975-01-01), McGrogan
patent: 3876980 (1975-04-01), Haemmig
patent: 3980956 (1976-09-01), Woolling
Leuschner Horst
Soobik Lembit
Comfort James T.
Donaldson Richard L.
Levine Harold
Pitts Harold I.
Texas Instruments Incorporated
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