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Although the value of input bias current is very small, it causes

(a) Output voltage

(b) Input offset voltage

(c) Output offset voltage

(d) All of the mentioned

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1 Answer

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The correct answer to this question is:

(d) All of the mentioned

Explanation: The input bias current, although very small, can cause several issues in an operational amplifier circuit:

  1. Output voltage: The small input bias current can flow through the resistors at the input, creating a voltage drop that results in a small unwanted output voltage.

  2. Input offset voltage: The difference in bias current between the two input terminals can also create a small voltage difference across the inputs, leading to input offset voltage.

  3. Output offset voltage: Similarly, the input bias current can cause an offset at the output because of the interaction between the bias current and the resistive network in the op-amp circuit.

Thus, input bias current can lead to all of these effects in an op-amp circuit.

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