tompham
Full Member level 2
Hi all
Im desinging 2 stage fully differential opamp with continous cmfb. My design using smic18mmrf with VDD=3.3v and input cm = output cm = 1.65v. I test transient with apply sin wave 20uV peak to peak
to see how output behave. From the waveform (see attached) , the output distortion at below output common mode. I have hard time to figure the problem even the opamp has good output swing. Anyone can help me with this. Thanks a lot
Im desinging 2 stage fully differential opamp with continous cmfb. My design using smic18mmrf with VDD=3.3v and input cm = output cm = 1.65v. I test transient with apply sin wave 20uV peak to peak
to see how output behave. From the waveform (see attached) , the output distortion at below output common mode. I have hard time to figure the problem even the opamp has good output swing. Anyone can help me with this. Thanks a lot