Amateur Extra › E7 Practical Circuits › E7G06
E7G06
What is the gain-bandwidth of an operational amplifier?
Pick an answer to check it.
Answer: B. The frequency at which the open-loop gain of the amplifier equals one
Gain-bandwidth is the frequency at which the op-amp's open-loop gain falls to 1. Gain times bandwidth is roughly constant, so more gain means less bandwidth.
Tip: GBW: where open-loop gain hits one.