Patent ID: 7830181

Claim:
A deglitch circuit, comprising: a plurality of signal transmission units, the signal transmission units being connected in serial to form a signal transmission unit string, and a first signal transmission unit of the signal transmission unit string receiving a digital signal, wherein one of the signal transmission units comprises: a first switch, having a first terminal coupled to a previous signal transmission unit of the signal transmission unit string and a control terminal receiving the digital signal, wherein the first switch is turned off when the digital signal has a first logic state, and the first switch is turned on when the digital signal has a second logic state; a first delay circuit, having an input terminal coupled to a second terminal of the first switch; and a second switch, coupled between an output terminal of the first delay circuit and a first voltage, wherein a control terminal of the second switch receiving the digital signal, the second switch is turned on when the digital signal has the first logic state, and the second switch is turned off when the digital signal has the second logic state.