Patent ID: 6922090

Claim:
A transition signaling circuit, comprising: a first Muller C element with an inverter having a first positive input terminal for inputting a first transition signal, a first negative input terminal for inputting a feedback signal, and a first output terminal for outputting a second transition signal, where said second transition signal having a same logical level as said first transition signal is output from said first output terminal when said first transition signal and said feedback signal are in different logical levels, and the previous state is maintained when said first transition signal and said feedback signal are in a same logical level; a first gate circuit having a first input terminal for inputting said second transition signal which is output from the first output terminal of said first Muller C element with an inverter, a second input terminal for inputting a first control signal, and a second output terminal which is operated by said first control signal and outputs an output signal corresponding to said second transition signal in ON status; and a second Muller C element with an inverter having a second positive input terminal for inputting said output signal which is output from said first gate circuit, a second negative input terminal for inputting a third transition signal, and a third output terminal for outputting said feedback signal to the first negative input terminal of said first Muller C element with an inverter, where said feedback signal having a same logical level as said output signal is output from said third output terminal when said output signal of said first gate circuit and said third transition signal are in different logical levels, and the previous state is maintained when said output signal of said first gate circuit and said third transition signal are in a same logical level.