Semiconductor integrated circuit device with threshold control
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United States of America Patent
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Apr 16, 2002
Issued Date -
N/A
app pub date -
Nov 9, 1999
filing date -
Apr 2, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The disclosed semiconductor integrated circuit device can control the threshold thereof without adding any other supply voltages except a drive supply voltage and a ground supply voltage. The semiconductor integrated circuit device comprises: a substrate potential generating circuit operative on the basis of a control signal, for deepening a substrate bias by pumping out charges from a semiconductor substrate when activated, but for setting an output thereof to a high impedance when deactivated; and a switch circuit operative on the basis of the control signal and turned on when the substrate potential generating circuit is deactivated, to set potential of the semiconductor substrate to a supply potential, but turned off when the substrate potential generating circuit is activated.
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