Patent ID: 6204707
Filing Date: 2001-03-20
Classification: H03K

Abstract:
A flip-flop circuit with clock signal control function comprises:a data holding output circuit for receiving a data input signal and an internal clock signal and for holding a value of said data input signal in synchronism with said internal clock signal to output said value of said data input signal as a data output signal;a discord detecting circuit for receiving said data input signal and data output signal of said data holding output circuit and for detecting the discord of said data input signal with said data output signal to output a discord signal; anda clock control circuit for receiving an external clock signal and said discord signal, and for outputting a shorter pulse than one cycle of said external clock signal as said internal clock signal in synchronism with the rising or falling of said external clock signal when said data input signal discords with said data output signal, and a signal of a first level as said internal clock signal when said data input signal coincides with said data output signal.