Power supply for telephone equipment memory devices
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United States of America Patent
Stats
-
Jul 30, 1985
Grant Date -
N/A
app pub date -
Jan 30, 1984
filing date -
Jan 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power supply circuit for use in a subscriber's telephone that incorporates memory devices for use in repertory dialing, last number recall, and similar functions. This circuit interfaces with the telephone line to provide the data retention supply current needs of volatile static memory devices. It also interfaces with the power supply of the associated logic circuitry to supply the needed operating voltage.
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