What is the input resistance of the following common source amplifier?

What is the input resistance of the following common source amplifier?

Common source FET amplifier characteristics summary

In which configuration Mosfet works as an amplifier?

But for a mosfet to produce linear amplification, it has to operate in its saturation region, unlike the Bipolar Junction Transistor. But just like the BJT, it too needs to be biased around a centrally fixed Q-point. MOSFETS conduct through a conductive region or path called “the channel”.

How do you measure the input resistance of an amplifier?

The generalised formula for the input impedance of any circuit is ZIN = VIN/IIN. The DC bias circuit sets the DC operating “Q” point of the transistor and as the input capacitor, C1 acts as an open circuit and blocks any DC voltage, at DC (0Hz) the input impedance (ZIN) of the circuit will be extremely high.

How does the MOSFET work in a circuit?

In this circuit the MOSFET converts variations in the gate-source voltage into a small signal drain current which passes through a resistive load and generates the amplified voltage across the load resistor. Also, from small signal model of shown in above Figure.

How does a common source amplification circuit work?

Common Source Amplifier : Figure below shows the common source amplifier circuit. In this circuit the MOSFET converts variations in the gate-source voltage into a small signal drain current which passes through a resistive load and generates the amplified voltage across the load resistor.

How to calculate the output impedance of a CS amplifier?

In order to calculate the output impedance of CS amplifier with CLM consider the circuit as shown in Figure below. Thus, the output impedance of the CS amplifier with CLM is ro || R D . In order to derive the voltage gain of CS amplifier with CLM using I-V characteristics consider the drain current equation with CLM as :