Propagation delay in CMOS? All Questions › Category: VLSI CMOS › Propagation delay in CMOS? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 4 years ago Propagation Delay (tpLH, tpHL), the delay measured from the time the input is at 50% of its full swing value to the time the output reaches its 50% value.