Patent
1974-11-01
1976-06-01
Mayer, Albert J.
H04B 132
Patent
active
039612678
ABSTRACT:
In a television receiver, a tuning voltage for a varactor tuner is generated by the actuated stage of a plural step neon lamp memory in which each memory stage corresponds to a different television channel. The memory stages are connected as a ring counter which is stepped sequentially by a two-speed oscillator having a fast scan for undesired channel representing stages, and a slow scan to maintain actuation for a short time period of selected memory stages which correspond to desired channels which are to be viewed. Each memory stage includes a potentiometer with a wiper adjusted to generate the tuning voltage. To preprogram the undesired channel representing stages, the potentiometers in the stages are adjusted to produce maximum voltage, which is detected by a threshold switch to cause the oscillator to rapidly step to the next memory stage. A counter detects when all memory stages have been scanned and then disables the oscillator thereby stopping the scanning to maintain selection of the original channel.
REFERENCES:
patent: 3515960 (1970-06-01), Buhr
patent: 3584307 (1971-06-01), Hewie
patent: 3714585 (1973-01-01), Koch
patent: 3839681 (1974-10-01), Mogi
patent: 3849731 (1974-11-01), Morita
Mayer Albert J.
Warwick Electronics Inc.
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