Apparatus to reduce the internal frequency of an integrated circuit by detecting a drop in the voltage and frequency
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United States of America Patent
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Nov 27, 2007
Grant Date -
Oct 7, 2004
app pub date -
Apr 23, 2004
filing date -
Oct 26, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A semiconductor integrated circuit is disclosed that operates in synch with a clock signal supplied from an external source, and by a voltage supplied by a power supply. The circuit includes a detection means for detecting that at least one of a frequency of the clock signal and the supply voltage is reduced, and an internal voltage reduction means for lowering an internal voltage of the semiconductor integrated circuit when the detection means detects that at least one of the frequency and the supply voltage is lowered.
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