Variable delay and setup time flip-flop

摘要

An apparatus is provided. The apparatus includes a flip-flop including an input configured to receive a setup time and delay control (SDC) signal, and an output buffer including first and second conductive paths. The second conductive path is non-conductive when the SDC signal has a first value at the input and is conductive when the SDC signal has a second value at the input. The apparatus includes a propagation delay sensor configured to estimate a propagation delay of the flip-flop, and, when the estimated propagation delay exceeds a threshold, supply the SDC signal having the second value to the input of the flip-flop.