Normal-mode rejection (NMR) is a term frequently used in circuits, electronic devices, and other types of engineering fields. It refers to the ability of a system to reject unwanted signals or disturbances while maintaining its stable operation. There are several synonymous terms used in this context including common-mode rejection, noise rejection, interference rejection, and signal filtering. Regardless of the term used, the concept remains the same, to remove or reduce unwanted signals and disturbances that are introduced through external sources or originating from the system itself. The ability to achieve a high level of NMR is critical in ensuring reliable and efficient operation of many types of electronic systems.