URGENT HELP PLEASE!!!
I want to design a wide swing cascode current mirror (question-left) and in order to apply Iref, I have designed a PTAT and applied it to M7 and M9 (design). Iref must be 50uA and the diagram of output should be like the diagram in picture (question-right).
The problem is that, When I do simulation, I have I=0 for V<0.6 and it gradually increases (pic3), while it shouldn't be like this. I don't know in which part I'm designing wrong and I don't know how to solve it. would you please help me urgently????
Thanks in advance.
I want to design a wide swing cascode current mirror (question-left) and in order to apply Iref, I have designed a PTAT and applied it to M7 and M9 (design). Iref must be 50uA and the diagram of output should be like the diagram in picture (question-right).
The problem is that, When I do simulation, I have I=0 for V<0.6 and it gradually increases (pic3), while it shouldn't be like this. I don't know in which part I'm designing wrong and I don't know how to solve it. would you please help me urgently????
Thanks in advance.
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