Semiconductor circuit device having hierarchical power supply structure
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United States of America Patent
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Aug 14, 2007
Grant Date -
Sep 1, 2005
app pub date -
Jul 29, 2003
filing date -
Nov 17, 1998
priority date (Note) -
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Abstract
Resistance elements are inserted into a main power supply line and a main ground line so that offset differential amplifiers receive voltages developed across the same. The differential amplifiers control transistors connected to a sub power supply line and a sub ground line. Thus, a leakage current flowing from the sub power supply line to the main ground line and that flowing from the main power supply line to the sub ground line are regularly kept constant. Consequently, it is possible to prevent an operation delay in an initial stage of a standby state while keeping an effect of reducing a subthreshold leakage current in a semiconductor circuit device having a hierarchical power supply structure.
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