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op amp using bjt
two decade = 40dB? It should be a voltage amp with cascade structure, which I assume you know what it means. It's a pretty general topic. You'd better ask your instructor for more details.
How to start gmC design
Please refer to David Johns book, Analog Integrated Circuit Design.
Purpose of GmC is to have a linear relationship between input I and output V. There are several ways to obtain constant Gm. For CMOS, you can apply triode region, constant drain voltage... Please check...
Re: Fabrication
Those are exactly what I wanted to say.
I think SCMOS and your steps are good enough to have a successful chip. Actually the actual model is not guarantee if you don't simulate your circuits carefully. In addition, for ESD, if you don't have any special reason, the pad mosis...
NCSU CDK
You can get NCSU CDK pack free on ncsu site. It's not hard to be installed. You can put most of the setup file under directory called 'cdssetup'. As DoctorX said, all model files are included. But they are scalable, not accurate.
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