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Fundamental-Slide35

Common mode rejection ratio changes with frequency. As shown in the graph on this slide, the top trace is the high performance differential amplifier; the red trace is the passive differential probe. As can be seen, as the frequency goes up, the CMRR goes down in both scenarios. The performance is better with the amplifier, the DA1855, it is better at the low frequency end and remains better overall.

PTM Published on: 2012-04-26