mordak
Member level 5
Hi,
I designed a folded cascode opamp with gain boosting and it works properly, now I want to design biasing voltages of the opamp. I could design a biasing circuitry for the main opamp, but I had a hard time finding a way to generate the dc voltages that need to be applied to the gain booster input. I mean, I found the values in the first step of the design and now want to generate those voltages using transistors (say NBIAS1 in the pic), and I wonder if I can make them with the circuit I am using as biasing circuit for the main opamp/gain booster, or not. Hope someone help me figure it out.
P.s: found this pic on edaboard and didn't draw it myself, besides it is not folded cascode, just wanted to show which voltage I was talking about.
I designed a folded cascode opamp with gain boosting and it works properly, now I want to design biasing voltages of the opamp. I could design a biasing circuitry for the main opamp, but I had a hard time finding a way to generate the dc voltages that need to be applied to the gain booster input. I mean, I found the values in the first step of the design and now want to generate those voltages using transistors (say NBIAS1 in the pic), and I wonder if I can make them with the circuit I am using as biasing circuit for the main opamp/gain booster, or not. Hope someone help me figure it out.
P.s: found this pic on edaboard and didn't draw it myself, besides it is not folded cascode, just wanted to show which voltage I was talking about.