Power supply system for an electronic apparatus having memory
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United States of America Patent
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Jun 30, 1987
Grant Date -
N/A
app pub date -
Dec 24, 1985
filing date -
Dec 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power supply system includes a main power unit for supplying power necessary for the operation of an electronic apparatus including a memory, an auxiliary power unit for supplying power necessary for retaining the memory contents, and a battery serving as a back-up of said main and auxiliary power units for supplying power necessary for retaining the memory contents. The memory is supplied with power from the main power unit when it is in the power-on state, from the auxiliary power unit when the main power unit is in the power-off state, and from the battery in the event of a.c. power failure.
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