All the key details about Op Amp frequency response and gain bandwidth product. Learn how to apply this to circuit designs to make sure you can get the gain you want with the bandwidth you need.

The gain, frequency response, bandwidth and gain bandwidth product of any operational amplifier or op-amp is of great importance. When designing an op amp circuit it is necessary to be able to choose the required gain whilst ensuring that the circuit bandwidth is sufficient. Using the op amp gain bandwidth product enables the required frequency response and bandwidth to be attained.

The op amp gain bandwidth product is a figure available in the data sheets and in this video we show you how to use this to calculate the bandwidth or frequency response of an op amp circuit for give amount of voltage gain.

In the video we also look at what op amp compensation, why it is needed and how it is implemented within an op amp. The video also looks at the effect of frequency compensation on the op amp bandwidth and frequency response.

We tell the story of early operational amplifiers and how they were unstable and how op amps like the 709 used external components for frequency compensation and then the 741 and how it was the first operational amplifier to use internal compensation.

It is worth noting that this video addresses voltage feedback op-amps which are by far the most widely used op-amps. The gain bandwidth characteristics are different for current feedback op-amps which are more specialist and used in rather niche applications. They are not nearly as widely available and have a current input rather than voltage inputs.


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