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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: How does its effect differ from isolation transformer? posted by Jon L on May 25, 2009 at 13:30:36:
but apparently not as much as a properly-sized choke.
The parasitic capacitance and high frequency AC resistance of the windings are what absorbs the noise. If the AC resistance is small, as in a beefy isolation transformer, then it will not dissipate the noise energy and simply reflect it back into the power line or let it pass through to the load. Similarly, if the AC resistance is too high, the device will also not absorb enough energy. There is an impedance-matching effect here.
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Follow Ups
- Isolation transformers also absorb some noise, - Al Sekela 16:08:50 05/25/09 (0)
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