Portable radio frequency/channel display system

Details Portable radio frequency/channel display system Portable radio frequency/channel display system

1980-06-25

1981-09-22

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

340805, 340811, H04B 116

Patent

active

042914124

ABSTRACT:
A portable radio frequency/channel display control system for use in a portable radio device or the like which is powered by a battery and of the type which includes a display for indicating the frequency/channel to which the radio is tuned. The system senses when a radio control is operated (such as the on/off switch, channel selector, etc.) and develops a control signal having a predetermined duration. The control signal causes the display to be energized for the predetermined duration and then the display is automatically de-energized.

REFERENCES:
patent: 3720876 (1973-03-01), Montgomery
patent: 3812489 (1974-05-01), Hirano et al.
patent: 3938131 (1976-02-01), Van Doorn et al.
patent: 3938138 (1976-02-01), Kojima et al.
patent: 3955185 (1976-05-01), Nishimura
patent: 4074256 (1978-02-01), Sekiya et al.

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