I'm reviewing a design that is using a 74HC14 schmitt trigger with the input biased to 1.2 VCC and a small signal AC coupled in. the AC signal is about
400mVp-p.VCC VCC | | R | Signal----||---+--- Schmitt trigger ---> digital out C R | | GND GND
Since it is a schmitt trigger it has ~ 50mV of hysteresis but is there cause for concern by leaving the input biased in the middle like that?