OPAMP

While designing CMOS OPAMP dow do we decide which one is inverting and which one is non-inverting input?

Asked By: jay_bits
On: Apr 19, 2005 2:45:11 AM

Comments(2)

hi, you can count the number of inversions from the input to the output by checking if the transistor that you are passing is in CS/CD/CG configuration. You will have an inversion only if it is CS, so that means if you have 3 CS and 1 CG from input to output, it is the inverting input. Shefali

Comment By: shefaliw
On: Apr 21, 2005 4:07:12 PM

hi, Anyway u shd know the internals of the circuitry so as to decide upon the ip qualifier. because the diff o/p of the first stage can be taken in two possibilities and this only decides which one is the inverting and non inverting. in general u can take anything since two trans are indentical but the diffop shd be taken accordingly.

Comment By: venkateshr
On: Apr 19, 2005 6:34:59 AM

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