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A standard CMOS inverter is designed with equal rise and fall times $(\beta_{n}=\beta_{p}).$ If the width of the pMOS transistor in the inverter is increased, what would be the effect on the LOW noise margin $NM_{L}$ and the HIGH noise margin $NM_{H}$?

  1. $NM_{L}$ increases and $NM_{H}$ decreases.
  2. $NM_{L}$ decreases and $NM_{H}$ increases.
  3. Both $NM_{L}$ and $NM_{H}$ increases.
  4. No change in the noise margins. 
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