4 ms·
> It's weird because CMRR is listed in decibels but it's absolutely a DC spec. If you get the Franco book equation 5.27 (my edition is the 3rd) explains why th
by hn4352 2y ago
> It's weird because CMRR is listed in decibels but it's absolutely a DC spec.
If you get the Franco book equation 5.27 (my edition is the 3rd) explains why they do that. Long story short: It's a convenient form when CMRR = dVcm/dVos due to the orders of magnitude involved.
- kazinator 2y agoThe moral is that you have to be careful. The ratio and decibels giving CMRR might not be the same as quoted for a given closed loop gain at a given frequency of interest.