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.
from Dangerous Prototypes http://bit.ly/2NiM8zm