1.2 Troubleshooting Tips: Op Amps - Common Mode Rejection Ratio
설명
2019년 5월 30일
Understanding how to verify datasheet specifications such as common mode rejection ratio (change in offset versus change in common mode) is critical to the application troubleshooting and debugging process. In this training the false summing junction circuit is utilized to demonstrate how to determine the CMRR of a linear amplifier. At the system level an offset anomaly versus input common mode voltage may result in the following signatures:
Increased or decreased output voltage compared to the nominal
Anomalous reading observed by ADC
Unexpected sensor reading
