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The below image is taken from Analog Devices design note DN1045. what is the use of M1 and M2? What is the use of REF and D1?

1 answer · posted 2d ago by newbie‭ · last activity 1d ago by Nick Alexeev‭

Question Analog opamp

#2: Post edited by

Nick Alexeev‭ · 2025-06-15T23:20:26Z (2 days ago)

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~~The below image is taken [from here](https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1045fb_web.pdf).~~
~~![Image_alt_text](https://electrical.codidact.com/uploads/uo4pt2zlyab3csf9kl4tovjbzdwk)~~
what is the use of M1 and M2?
What is the use of REF and D1?

The below image is taken from [Analog Devices design note DN1045](https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1045fb_web.pdf).
![high side current sensor made with LTC2063 op-amp](https://electrical.codidact.com/uploads/uo4pt2zlyab3csf9kl4tovjbzdwk)
what is the use of M1 and M2?
What is the use of REF and D1?

#1: Initial revision by

newbie‭ · 2025-06-15T20:12:25Z (2 days ago)

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High side current sense

The below image is taken [from here](https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1045fb_web.pdf).

![Image_alt_text](https://electrical.codidact.com/uploads/uo4pt2zlyab3csf9kl4tovjbzdwk)

what is the use of M1 and M2?

What is the use of REF and D1?

Analog opamp

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