App note: Understanding the safety certification of digital isolators

Use a Twist and Other Popular Wires to Reduce EMI RFI

We combine the twisted pair and lowpass filters to produce spectacular rejection of radio frequency interference (RFI) and electromagnetic interference (EMI). We also illustrate use of a precision resistor array to produce a customizable differential amplifier. Link here

A twist. “The Twist.” A twisted pair. Alexander Graham Bell patented twisted-pair wires in 1881. Remarkably, we still use them because they work so well. In addition, today by harnessing incredible computer power in field-programmable gate arrays (FPGAs), circuit simulators, and filter design programs we can make a twisted-pair wire even more useful in data communication.

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