exp
Full Member level 1
I have a pretty easy question: What is the proper way to bias a cascode with resistive load?
Clearly I can play around with R and W and the voltages to get a desired drain current but to my understanding the proper way to bias in analog IC design is to use current sources/mirrors.
Specifically, I want to bias the following circuit to get a certain drain current (how to generate Vb1 and Vb2?):
It is a CG (at RF) + cascode. Instead of just using resistors I put them in a way they have only effect differentially.
For Vb1 and Vb2 I can use a simple a wide swing cascode current mirror (like
but this only works if the drain current is very small (possibly because drain of cascode is not low impedance).
Clearly I can play around with R and W and the voltages to get a desired drain current but to my understanding the proper way to bias in analog IC design is to use current sources/mirrors.
Specifically, I want to bias the following circuit to get a certain drain current (how to generate Vb1 and Vb2?):
It is a CG (at RF) + cascode. Instead of just using resistors I put them in a way they have only effect differentially.
For Vb1 and Vb2 I can use a simple a wide swing cascode current mirror (like
but this only works if the drain current is very small (possibly because drain of cascode is not low impedance).
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