dc#transfer#curve# - indian institute of science
TRANSCRIPT
Process Varia4ons
• Threshold voltages are random variables – Gaussian pdf is a good approxima4on
• Consequantly, inverter trip point (Vinv) – Is also a random variable – As are other characteris4cs which depend on threshold
Why is there noise?
• DC Noise due to sta4c voltage drops in the power grid
• AC noise: – due to coupling of switching signals – Transients in power grid
Importance of gain
• Larger gain beUer noise margin • Restoring effect of logic levels in a long chain • Large Vt – beUer gain