Patent ID: 7420398
Filing Date: 2008-09-02
Classification: H03K

Abstract:
1. A pulse extension circuit for extending a pulse signal comprising: an input unit for receiving the pulse signal; an edge detection unit coupled to the input unit for generating an initiation signal according to the pulse signal; a pulse initiation unit coupled to the edge detection unit for outputting a control signal and for adjusting a voltage level of the control signal according to the initiation signal and a first reset signal; a pulse width control unit coupled to the pulse initiation unit for outputting a termination signal according to the control signal, the first reset signal and a second reset signal; a reset unit coupled to the edge detection unit, the pulse initiation unit and the pulse width control unit for outputting the first reset signal and the second reset signal to reset the pulse initiation unit and the pulse width control unit according to the initiation signal, the termination signal and a clearing signal; and an output unit coupled to the input unit and the pulse initiation unit for extending a signal period of the pulse signal according to the pulse signal and the control signal.