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Self-Biasing Supply Independent Reference (Read 528 times)
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Self-Biasing Supply Independent Reference
Jun 17th, 2017, 5:13am
Hi All,

I am trying to reach better performance from a bootstrap biasing. Actually I need to achieve a better PSR.

I was wondering how to calculate the analytic expression for the supply rejection.

The topology has a positive feedback loop, I don't know if the same method for a negative  feedback loop is still valid.

Thanks so much,


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Frankfurt, Germany
Re: Self-Biasing Supply Independent Reference
Reply #1 - Dec 1st, 2017, 5:47am
PSR is basically the inverse of gain of the circuit to any supply noise. With reference to your circuit, the gain happens through M2 (common gate amplifier) and the current mirror acts as the load.
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