What is tpLH and tpHL in CMOS VLSI circuits? All Questions › Category: VLSI CMOS › What is tpLH and tpHL in CMOS VLSI circuits? 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 time low-high and propagation time high-low.