Op Amp
Unity-gain Bandwidth

The unity-gain bandwidth of an op amp is the entire range of frequencies in which an op amp can produce gain.

An op amp is able to amplify sound only through a certain range of frequencies. Once it reaches its maximum frequency in which it was designed to handle, it will then produce no gain at all after this frequency.

Below is a chart showing the unity-gain bandwidth of an op amp:

You can see how the unity-gain bandwidth spans the entire range of frequencies that an op amp can produce gain for. After this point, it cannot produce sound. The unity-gain bandwidth covers the full-power bandwidth, the half power point, and the gain-bandwidth product. It ends at the point where no more gain is produced; this point is called the transition frequency. Above frequencies of the transition frequency, the op amp cannot produce any gain because the frequency has exceeded the range the op amp was designed for.