Electronics - Field Effect Transistors (FET) - Discussion

Discussion Forum : Field Effect Transistors (FET) - General Questions (Q.No. 24)

Field Effect Transistors (FET)

24.

How will a D-MOSFET input impedance change with signal frequency?

As frequency increases input impedance increases.

As frequency increases input impedance is constant.

As frequency decreases input impedance increases.

As frequency decreases input impedance is constant.

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

5 comments Page 1 of 1.

Kunwar said: 8 years ago

We know G.BW product very low in fet but Constance but we bw increase then gain decrease means input resistance increase.

Jaya said: 8 years ago

Yes, you are Right @Vijay.

Vijay said: 1 decade ago

We know that MOSFET is like a capacitor. And we know the impedance of capacitor = 1/2pifC. Inversely proportional.

Kiran said: 1 decade ago

In simple, consider the relation between impedance and frequency, they are inversely proportional. Hence, option C apts much.

Jayalakshmi said: 1 decade ago

Can someone explain how?

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