Static protection circuit for a semiconductor integrated circuit device
AssigneeMotorola, Inc.
InventorsHidetaka Fukazawa, Satoshi Sekine
Life of this patent
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Abstract
A static protection circuit for a semiconductor integrated circuit device which provides static protection for an integrated circuit driven on multiple different power supply voltages is provided. The static protection circuit comprises a transistor having its two controlled terminals connected to each of the power supply lines and a GND line, respectively, and its control line connected to one of said controlled terminals; and a transistor having its controlled terminals connected to each of said power supply lines and its control terminal to which a nonconductive voltage is applied.
Claims4
A static protection circuit for a semiconductor integrated circuit device, including at least first and second power supply lines that supply different power supply voltages and a GND line, said circuit comprising:
- a first transistor having two controlled terminals and a control terminal, the controlled terminals connected to the first power supply line and said GND line, respectively, and the control terminal connected to one of said controlled terminals;
- and
- a second transistor having two controlled terminals and a control terminal, the controlled terminals connected to the second power supply line and said GND line, respectively, and the control terminal connected to one of said controlled terminals;
- and
- a third transistor having controlled terminals connected to each of said first and second power supply lines, and a control terminal to which a nonconductive voltage is applied.
Dependencies are inferred from the claim text.