Question

A standard block diagram of closed loop system composes of

(a) Two blocks

(b) Single block

(c) Three blocks

(d) None of the mentioned

The question was asked during an online exam.

I need to ask this question from Closed-Loop Frequency Response and Circuit Stability in portion Practical Limitations of Op Amp Circuits of Linear Integrated Circuits

Answer 1

The correct answer is:

(c) Three blocks

Explanation:

A standard block diagram of a closed-loop system typically consists of three blocks:

1. Input: This is the signal or function that is fed into the system.
2. Controller: The block that processes the input and compares it to the desired output. It adjusts the system's behavior to minimize error.
3. Output: The result of the system's operation.
4. Feedback: The feedback loop that takes the output and feeds it back into the controller to adjust the system's performance, which forms the closed-loop configuration.

This feedback mechanism helps control the output and ensures stability in the system.

Thus, the correct answer is three blocks in the standard block diagram for a closed-loop system.