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[SOLVED] Amplifier output stage

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yonutz88

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Can anyone tell me what is the purpose of the stage formed by the transistors M19 and M20?opamp.JPG
 

jardila

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Hi,

These transistors form an output stage that allows you to have a high output voltage swing. If you keep the output between M14 and M16, for example,
your output voltage swing will be less.

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leo_o2

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In additional, M19 will provide big current sourcing capability.
 

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