a latch for detecting a state transition of an input signal and generating a self - clearing reset signal on an output . the latch comprises : 1 ) a transfer gate for passing the input signal to a first node when the input transfer gate is enabled ; 2 ) a transition detector for detecting a transition of the first node from a first to a second state , wherein the transition detector , in response to the transition , disables the transfer gate and enables the reset signal ; and 3 ) a feedback loop circuit for detecting enabling of the reset signal . the feedback loop circuit , in response to the enabling , changes the first node from the second state back to the first state . the transition detector , in response to the changing of the first node back to the first state , disables the reset signal .