Question

Why it is necessary to calibrate all op-amp in the system periodically?

(a) To maintain current drift of a system

(b) To maintain output offset voltage in op-amp

(c) To maintain accuracy and linearity of a system

(d) None of the mentioned

I had been asked this question in an interview for internship.

Question is from Interpreting of Data Sheets in chapter Operational Amplifier Characteristics of Linear Integrated Circuits

Answer 1

Right option is (c) To maintain accuracy and linearity of a system

Expand on the concept with: In practice, the output offset voltage in all op-amp circuit will change with time. Therefore, to maintain the desired accuracy and linearity of a system, it is necessary to calibrate all op-amps in that system periodically.