Electromagnetic interference in low-voltage circuits typically originates from a variety of sources. These can include rapid changes in current within the circuit itself, such as those occurring during switching operations in digital systems, or from external sources like nearby electronic devices, radio waves, and even atmospheric electrical activity. For example, a poorly shielded cable carrying a high-frequency signal can act as an antenna, radiating electromagnetic energy and potentially interfering with sensitive components in a nearby low-voltage circuit.
Understanding the root causes of electromagnetic interference is crucial for ensuring the reliable operation of electronic systems, particularly in low-voltage applications where signal integrity can be easily compromised. Addressing these sources during the design phase through proper shielding, grounding, filtering, and component selection can significantly reduce or eliminate unwanted interference. Historically, mitigation techniques have evolved from simple grounding practices to sophisticated electromagnetic modeling and simulation tools, reflecting the increasing complexity of electronic circuits and the growing demand for robust and interference-free operation.
