Dram nonvolatizer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 11, 1990
Grant Date -
N/A
app pub date -
Sep 23, 1988
filing date -
Sep 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A nonvolatile memory subsystem includes DRAMs and a battery-backed controller chip. The controller chip monitors the system power supply level to ascertain power fault conditions. When a power fault is detected, the controller provides the DRAMs with both a regulated supply voltage and appropriately timed refresh signals. After the system power supply has returned to specification, the controller continues to generate refresh control signals until the commands it to stop.
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