Physics · VLSI Design
The pull-up to pull-down ratio (Zpu/Zpd) for an nMOS inverter driven by another nMOS inverter can be evaluated using which of the following expressions? (A) Vinv = Vt - Vtd√(Zpu/Zpd) (B) Vinv = -Vtd√(Zpu/Zpd) (C) (WpdLpd)(Vinv - Vt)2 = (WpuLpu)(-Vtd)2 (D) (WpdLpd)(Vinv - Vt) = (WpuLpu)(-Vtd)2
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(A) and (C) only
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