folded cascade一级放大镜结构问题

社会科学家

为什么到nA级电流的情况下，需要共模反馈才能让管子全部饱和，但是输出幅度就不对？

onepound

please could you give schematic as example

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onepound 发表于 2025-11-13 06:38
please could you give schematic as example

thank you reply，this is example

onepound

I think at 80nA they can only be in subthreshold. The common mode circuit might be needed to bias correctly where the currents used are way too small to generate common mode reliably.

Hopefully somebody can answer this question.

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onepound 发表于 2025-11-16 02:07
I think at 80nA they can only be in subthreshold. The common mode circuit might be needed to bias co ...

thank your reply