* Question
| What is a two-stage operational amplifier? |
* Answer
| Although a single-stage operational amplifier can achieve very high gains, it is often difficult, and sometimes impossible, to consider both the output voltage swing requirements.Especially when the gain and swing requirements are high, they can be considered separately, the first stage amplifier provides high gain, and the second stage amplifier provides large swing.When used as an output stage to an off-chip circuit, the second stage primarily provides sufficient ability to drive the load. |
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