CHL
Member level 3
Hello
Stability issue occurs only when there is a feedback in an amplifier.
If an OPAMP works in open-loop, there isn't the stability problem.
However, when we design an OPAMP, we consider the phase margin and gain margin although there isn't a feedback initially (we may include a feedback path after designing the amp).
What is the reason?
Is it for the general use of the OPAMP? (ex, any feedback loop can be added to make a feedback amp, such as a buffer by connecting the input and output directly)
Thanks
Stability issue occurs only when there is a feedback in an amplifier.
If an OPAMP works in open-loop, there isn't the stability problem.
However, when we design an OPAMP, we consider the phase margin and gain margin although there isn't a feedback initially (we may include a feedback path after designing the amp).
What is the reason?
Is it for the general use of the OPAMP? (ex, any feedback loop can be added to make a feedback amp, such as a buffer by connecting the input and output directly)
Thanks