| 摘要 |
A delay circuit is disclosed for providing highly stable delay time in digital signal processing. The delay circuit includes a preliminary charging/discharging circuit, a signal processing circuit and an output circuit. The preliminary charging/discharging circuit performs charging and discharging operations based on a logic input signal for generating a voltage signal. The signal processing circuit performs signal processing on the voltage signal for generating a first delay signal and a second delay signal. The output circuit performs logic signal processing on the first and second delay signals for generating a logic output signal lagging behind the logic input signal by a delay time. The delay time is independent of any supply voltage. That is, even though the supply voltage is unstable, the delay circuit is capable of generating a stable logic output signal by performing a signal delay process on a logic input signal regardless of the unstable supply voltage.
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