Question

Which factor affect the input offset voltage, bias current and input offset current in an op-amp

(a) Change in temperature

(b) Change in supply voltage

(c) Change in time

(d) All of the mentioned

The question was posed to me in an international level competition.

I would like to ask this question from Thermal Drift in section Operational Amplifier Fundamentals of Linear Integrated Circuits

Answer 1

The factors that affect input offset voltage, bias current, and input offset current in an op-amp include:

1. Temperature: All parameters vary with temperature (thermal drift)

2. Supply voltage: Changes in power supply affect op-amp parameters

3. Time: Parameters can drift over the lifetime of the device

All three of these factors significantly impact op-amp characteristics.

Answer: (d) All of the mentioned