Increasing CMRR with precise matched resistor networks

Ever wonder how to further maximize the circuit's Common-Mode Rejection Ratio (CMRR) to achieve high system performance? As we all enter the electronics world designing discretely and learning how to better match each component in the signal chain, technology has evolved to provide us with precision matched resistor networks.


This article walks through the performance that can be obtained when designing differential amplifier circuits with discrete resistors and matched resistor networks, and how the latter help increase the CMRR in the design.