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A transformer couples two or more AC signals through a magnetic field. Often used as galvanic isolation and to transform one AC voltage to another.

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Can transformer secondary side noise couple back to the primary side?

As this picture: Basically, only the noise of primary side will be coupled to secondary side. I read this wiki and know of leakage flux in the secondary side. If the secondary side has noise current …
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E-I transformer vs ring transformer applied to isolation transformer in audio

Most higher-end audio systems have an isolation transformer between mains electricity and DAC/AMP(audio system.) I know ring transformers havr higher efficiency than E-I transformers. … But noise after through transformer I'm noy sure. (Audio system desires good sinusoid power input.) I'd like to know which is better suited in an isolation transformer on an audio system. …
curlywei's user avatar
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