Multiple choice

Both the inputs of an OPAMP are grounded. The Vcc and Vee are applied to OPAMP. The OPAMP shows an output voltage of 10 mv. Which one of the options explains this correctly?

  1. Output should be 0mv and OPAM is faulty

  2. Due to input offset voltage characteristic of OPAMP

  3. Output offset characteristic

  4. By having very high CMRR

  5. Both (1) and (4)
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C Correct answer
Explanation

Output offset characteristic is defined as: it is the voltage (may be 10 mv) produced by the OPAMP when its both inputs are grounded. This is not a faulty condition, rather some time it is required  in some applications.

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