Communications: electrical – Digital comparator systems
Patent
1975-04-01
1976-04-27
Libman, George H.
Communications: electrical
Digital comparator systems
328 63, 325 42, 343228, H04B 700
Patent
active
039538320
ABSTRACT:
Circuit arrangement in a remote control receiver unit for evaluating received remote control signals by counting the number of periods, particularly of ultrasonic oscillations for the remote control of a radio or television set, the arrangement including an oscillator producing oscillations which are utilized for the evaluation, and which have a frequency higher than the frequency of the received oscillations, a counter connected to receive the higher frequency oscillations and to be controlled by the received oscillations so that when the received oscillations are present the counter emits a pulse during each of the received oscillation periods and when no received oscillations are present due to interference, the oscillator oscillations are divided by the counter to the frequency of the received oscillations so that interruptions in the received oscillations have no influence on the subsequent circuit portions.
REFERENCES:
patent: 2980858 (1961-04-01), Grondin et al.
patent: 3350580 (1967-10-01), Harrison
patent: 3611297 (1971-10-01), Kramer
patent: 3855575 (1974-12-01), Leuschner et al.
Libman George H.
Licentia Patent Verwaltungs-G.m.b.H.
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