| 摘要 |
A variable delay circuit for arbitrarily change of a signal delay helps easily attain a desired resolution with a high precision, which has been difficult due to device process dependence of a voltage control circuit applying a voltage to a CMOS circuit. A variable voltage controller is provided between a power source and a CMOS circuit propagating a signal such that a delay time of signal propagation is supervised by controlling the voltage at a connecting point in the variable voltage controller. The controller includes two MOS transistors and an npn transistor, which solves the process dependence and hence leads to a low power consumption and a high resolution.
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