Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The body effect in MOSFET causes the threshold voltage \(V_{th}\) to increase as source-body voltage \(V_{SB}\) increases. Reason (R): Increasing \(V_{SB}\) resets the surface potential and therefore reduces the barrier for inversion. In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

In MOSFET body effect: \[ V_{SB}\uparrow \Rightarrow V_{th}\uparrow \] because increasing source-body reverse bias widens the depletion region and makes channel inversion more difficult.

Answer 1

The Correct Option is C