Controlling circuit for automatically adjusting clock frequency of a central processing unit
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United States of America Patent
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Jun 23, 2009
Grant Date -
Apr 5, 2007
app pub date -
Aug 18, 2006
filing date -
Sep 2, 2005
priority date (Note) -
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Abstract
A controlling circuit for automatically adjusting clock frequency of a CPU is provided. The controlling circuit includes: a current sensing circuit for converting a current signal of the CPU to a voltage signal; a voltage amplifying circuit for amplifying the voltage signal; a multi-stage switching circuit for converting the amplified voltage signal to switched signals; and a priority decoding circuit decoding the switched signals, the decoded switched signals being input to a clock generator of the CPU, and thereby adjusting the clock frequency of the CPU to fit different load on the CPU.
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