Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1991-09-27
1994-04-26
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
4551662, 4551613, 455345, H04B 116
Patent
active
053075137
ABSTRACT:
In an autoradio such that a desired broadcasting channel can be received by reading a channel frequency from a preset memory in which plural channel frequencies are previously stored (one-touch station selection), the preset memory is provided with a table for storing plural channels classified according to each of plural broadcasting areas, and a receivable channel frequency is stored at corresponding channel memory spaces of all the broadcasting areas of the preset memory when any channel frequency is not yet stored but at only a corresponding channel memory space of the current broadcasting area thereof when already stored, whenever a preset switch is depressed. When a station automemory switch is depressed, the above operation is executed automatically to store all receivable channel frequencies. Since all the channel frequencies can be stored in the preset memory according to the broadcasting areas, it is possible to hear any desired channel by simple one-touch station selection, no matter when the vehicle travels in any broadcasting areas.
REFERENCES:
patent: 4367559 (1983-01-01), Tults
patent: 5086511 (1992-02-01), Kobayashi et al.
"Service Weekly"; by Nissan Corp. No. 626, Jun. 1989, pp. E-46-53.
Eisenzopf Reinhard J.
Nissan Motor Co,. Ltd.
Sobutka Philip J.
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