not sure I fully understand common mode and differential mode voltages

Back to Basics: The Fundamentals of 4-20 mA Current Loops

Common Mode Rejection Ratio - SlideServe

Mitigation of scintillation noise by common mode rejection, Proceedings of SPIE | DeepDyve

SOLVED: 5. Find the common mode rejection ratio (CMRR) of the following circuit, in dB, assuming an ideal op amp.As shown in the lecture example,this is done by finding the differentia mode gain Adm(Adm=V./vi when Va = -vi/2 and Vp= vi/2), the common mode gain Acm Adm (Acm = Vo / vi when Va = Vp = vi), and then calculating CMRR = 20 log AWW 27k 15VWW 6.8kVoWW 8.2k15V361

Common Mode Choke Selection

Common Mode Choke Finder and Analyzer | Coilcraft