Question

An increase in reverse bias of a photodiode results in

• A. Decreased depletion width
• B. Increased junction capacitance
• C. Faster response time
• D. Reduced bandwidth

Hint:

Increasing the reverse bias of a photodiode: \[ \boxed{ \begin{aligned} \text{Depletion width} &\uparrow \text{Junction capacitance} &\downarrow \text{Response speed} &\uparrow \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall the effect of reverse bias. Increasing the reverse bias increases the depletion region width and decreases the junction capacitance.

Step 2: Determine its effect on performance. The reduced junction capacitance allows charge carriers to be collected more quickly, resulting in \[ \boxed{\text{Faster response time}.} \] Therefore, \[ \boxed{(C)} \] is the correct answer.