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The preference for NMOS, when compared to other logic families arises a) as it uses more silicon area b) as it consumes less static power c) as it utilizes a smaller silicon area d) as it has a higher input impedance Which of the following options is correct?

The preference for NMOS, when compared to other logic families arises a) as it uses more silicon area b) as it consumes less static power c) as it utilizes a smaller silicon area d) as it has a higher input impedance Which of the following options is correct? Correct Answer c) is correct but d) is wrong

NMOS has the following characteristics:

1. it uses a smaller silicon area.

2. it consumes high static power

3. it has a lower input impedance

Important points:

  • CMOS technology is mainly used in digital logic circuits construction like microprocessors, microcontrollers, memory, etc.
  • NMOS and PMOS technologies are also used in designing digital logic circuits and in this collection and transfer of charge mechanism is not used.
  • Nowadays CMOS technology is used widely and no PMOS and very rare NMOS technology is used in designing an integrated circuit.

The key difference between NMOS, PMOS, and CMOS

NMOS

PMOS

CMOS

Electrons are major carriers.

Hole are major carriers.

Both electrons and holes are a carrier.

The P-type substrate is used

The N-type substrate is used

Both types of substrate are used based on application

Source and drain are n-type

Source and drain are p-type

CMOS used NMOS and PMOS simultaneously.

Conduct only when high voltage is applied to the gate

Conduct only when low voltage is applied to the gate.

NMOS and PMOS gate is connected based on applied voltage only one is conducted.

Faster than PMOS

Slower

Very faster

Rarely used in the design

Almost not used for design

Mostly CMOS is used for design.

Good noise immunity

Less noise immunity

Excellent noise immunity

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