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A CMOS amplifier when compared to an N–channel MOSFET, has the advantage of

A CMOS amplifier when compared to an N–channel MOSFET, has the advantage of Correct Answer Lower drain current from the power supply, thereby less dissipation

Complementary Metal-oxide-semiconductor (CMOS) uses complementary & symmetrical pair of P-type & n-type MOSFETS.

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  • The two important characteristics of CMOS devices are high noise immunity and low power dissipation.
  • CMOS devices dissipate less power than NMOS devices because the CMOS dissipates power only when switching (“dynamic power), whereas N channel MOSFET dissipates power whenever the transistor is on because there is a current path from Vdd to Vss.
  • In a CMOS, only one MOSFET is switched on at a time. Thus, there is no path from voltage source to ground so that a current can flow. Current flows in a MOSFET only during switching.
  • Thus, compared to N-channel MOSFET has the advantage of lower drain current from the power supply, thereby causing less power dissipation.

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