Circuit for adjusting a self-refresh rate to maintain dynamic data at low supply voltages
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United States of America Patent
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Aug 5, 2003
Issued Date -
N/A
app pub date -
Jul 31, 2002
filing date -
Oct 9, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for refreshing dynamic data stored in an integrated circuit are disclosed. The integrated circuit receives a supply voltage and operates in a self-refresh mode of operation to refresh the dynamic data at a refresh time that defines how often the dynamic data is refreshed during the self-refresh mode. The circuit includes monitoring a magnitude of the supply voltage and adjusting the refresh time as a function of the monitored magnitude of the supply voltage. The integrated circuit may be any type of integrated circuit that stores dynamic data, such as a memory device like a dynamic random access memory, DDR DRAM, SLDRAM, or RDRAM, or other type of integrated circuit such as a microprocessor.
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