NMOS - Drivers in CMOS inverter

Q.  Which among the below mentioned devices acts as a driver in CMOS Inverter Circuit?
- Published on 24 Sep 15

c. Both a and b
d. None of the above



  • Satyawati   -Posted on 05 Oct 15
    The term complementary indicates that both n-channel and p-channel MOSFETs are used in the same circuit.

    A p-channel enhancement mode of MOSFET (M1) is adopted as a load for n-channel enhancement mode MOSFET (M2) in order to form CMOS inverter circuit.

    In CMOS inverter, PMOS device behaves as a load while NMOS device behaves as a driver. Since the PMOS device acts as a load, it is also referred as an 'Active load'. Biasing of N-MOS driver takes place in such a way that it can operate in saturation or non-saturation region.

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