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opamp design for bandgap
It's impossible.The Vth of the input nmos will increase for the V between S and B.And u still need a Vds.So I suggest u used pmos input OA.
The BGR I designed also has bad stability.The output votage changed with the variety of VDD.
The OA is correct and good performance, and I also used cascode. All transistors work in saturation.
When VDD changed between 8v to 18v,the output changed about 20mv.I don't know why.
I hope someone can...
If we do need a op amp with low output resistance when we used the op amp in a unity-gain configuration?
I think the negative feedback in the unity-gain configuration has made the circuit get low output resistance.So it will not care the value of the output resistance of the op amp.Here we...
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