nxing
Advanced Member level 1

Hello everybody,
I am designing a CMOS active Gilbert Mixer and running into the linearity problem. The problem is that the switching pair degrade my linearity quite a lot (for iip3 roughly about 10dB). I can not understand how this happens? Is it because of the non-linearity of the on-resistance? If so, how to improve that?
Thanks
I am designing a CMOS active Gilbert Mixer and running into the linearity problem. The problem is that the switching pair degrade my linearity quite a lot (for iip3 roughly about 10dB). I can not understand how this happens? Is it because of the non-linearity of the on-resistance? If so, how to improve that?
Thanks