Sub-miniature tone encoder with automatic number identification
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United States of America Patent
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-
Oct 19, 1982
Grant Date -
N/A
app pub date -
Sep 22, 1980
filing date -
Sep 22, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digitally synthesized tone encoder and automatic number identification generator for a radio-telephone is presented herein. The system includes a tone burst generator for producing two audio tones simultaneously in response to either a keypad input or sequencing of a multiplexer providing a single-pole eight-throw switching function in response to the incrementing of a counter.
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Cited Art Landscape
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