[time-nuts] OP-Amps for 10MHz distribution...?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Feb 29 06:22:43 UTC 2012

For the OPA653 the noninverting configuration has lower distortion at 
least for 2V pp outputs.


gary wrote:
> Just a FYI, some op amps have lower distortion in inverting mode than 
> as a follower. This is not intuitively obvious since a follow has 
> maximum feedback, which would imply the best linearity. However the 
> distortion as a follower is due to the common mode rejection of the op 
> amp. That is the inverter has the front end differential pair at a 
> virtual ground while the follower moves the differential pair with the 
> signal.

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