In my last blog post, I discussed why instrumentation amplifier power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) improve as the amplifier’s gain increases.

Returning to the simplified model of an instrumentation amplifier…

Power supply rejection ratio (PSRR) describes how well an operational amplifier (op amp) rejects variations in power supply voltage. PSRR is defined as the shift in offset per volt of shift in power…