Three key techniques for improving interference resistance in signal isolators

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When in use, signal isolators work with single or dual current or voltage signals. However, they can sometimes be affected by various interference factors, which render them ineffective. Below are three key techniques for reducing such interference: 1. Use hardware circuits to suppress the impact of spikes from various devices; this can be achieved by incorporating an interference controller at the power input of the signal isolator or by using a super-isolation transformer. This approach yields excellent anti-interference results. In practical applications, a varistor is often connected in parallel at the input of the signal isolator, as it helps to reduce the voltage coming from the power supply during peak moments, thereby minimizing interference. 2. Use installation software to reduce interference. Some software can be installed on the signal isolator; when periodic interference occurs, this software can be programmed to carry out filtering, thereby eliminating the interference. 3. Adopt a combination of soft and hard methods to resist interference. By combining these two methods, this approach can counteract a wider range of interferences, and its resistance capability is also **enhanced**. It is also a commonly used anti-interference measure at present. These are the three common anti-interference measures used in signal isolators. In addition to these, in some cases, power supply is provided in separate groups or a noise filter is installed to help the signal isolator resist interference from various devices; the choice of such method depends on the type of signal isolator.