| 摘要 |
PROBLEM TO BE SOLVED: To enable to make electrostatic discharge (ESD) capacitance small, while maintaining a required ESD protection level, in ESD of high frequency application. SOLUTION: A capacitive load effect of an ESD circuit having an electrostatic protection diode is reduced by using a capacitance compensation circuit. In a normal operation in which static discharge does not occur, a capacitance reduction circuit maintains reverse bias in the electrostatic protection diode so that the capacitance of the diode is lower than a predetermined value. When static discharge occurs, the capacitance compensation circuit removes an applied reverse bias and the static discharge is made to be shunted to a power rail by the electrostatic protective diode. COPYRIGHT: (C)2005,JPO&NCIPI
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