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When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, the transistors are operating in:
  • a)
    N-MOS is cutoff, p-MOS is in Saturation
  • b)
    P-MOS is cutoff, n-MOS is in Saturation
  • c)
    Both the transistors are in linear region
  • d)
    Both the transistors are in saturation region
Correct answer is option 'D'. Can you explain this answer?
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When the input of the CMOS inverter is equal to Inverter Threshold Vol...
When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, both the transistors are operating in saturation region
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When the input of the CMOS inverter is equal to Inverter Threshold Vol...
Explanation:
When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, the transistors are operating in saturation region. Let us see how both the transistors are operating.

N-MOS Transistor:
- The gate-source voltage is Vgs = Vth
- The drain-source voltage is Vds = Vout
- The drain current is given by Id = (1/2) * μn * Cox * (W/L) * (Vgs - Vth)² * (1 + λVds)
- As Vds = Vout is high, the transistor is in saturation region.

P-MOS Transistor:
- The gate-source voltage is Vgs = -Vth
- The drain-source voltage is Vds = Vdd - Vout
- The drain current is given by Id = (1/2) * μp * Cox * (W/L) * (Vgs + Vth)² * (1 + λVds)
- As Vds = Vdd - Vout is high, the transistor is in saturation region.

Hence, both the transistors are operating in saturation region.

Conclusion:
When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, both the transistors are operating in saturation region.
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When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, the transistors are operating in:a)N-MOS is cutoff, p-MOS is in Saturationb)P-MOS is cutoff, n-MOS is in Saturationc)Both the transistors are in linear regiond)Both the transistors are in saturation regionCorrect answer is option 'D'. Can you explain this answer?
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