Q. 8 For a MOSFET biased in saturation region at drain-current ld = 100 HA and overdrive voltage of

Q. 8 For a MOSFET biased in saturation region at drain-current ld = 100 HA and overdrive voltage of 0.2 V, calculate the input noise voltage (thermal noise) in volts/Hertz1/2. This MOSFET is used in a common source amplifier and is driven by voltage as shown in Fig. 3. Calculate the noise figure for this amplifier. Assume no channel-length modulation in MOSFET. C * becomes a short for AC signal. 10 marks DC current bias 100 HA C oo 50 ohm AC voltage R 200 Source Vout R 50 Q NMOS Vin Fig. Q8. DC current biased Common source amplifier. S

 

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