PPT Slide
Logic levels, voltage, & definitions
- Logic gates operate on real physical voltages
- We cannot guarantee precise voltages, so we allow a range
- Voh ? minimum output voltage high
- Vol ? maximum output voltage low
- Guaranteed logic swing ? Voh– Vol
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- Vih ? minimum input voltage high
- Vil ? maximum input voltage low
- Noise margin: NML = Vil – Vol NMH = Voh – Vih