- Example inverters connect in series:
- Characteristic of ideal and actual inverters:
- tpd,1-0 is the propagation delay through inverter A for a 1 to 0 transition
- tpd,0-1 is the propagation delay through inverter A for a 0 to 1 transition
- tpd,1-0 and tpd,0-1 delays are not necessarily equal
- For simplicity, we characterize digital gates by a single delay, propagation delay tpd:
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