Transformer correction circuit and technique for reducing cross-talk current

摘要

An apparatus and technique that reduces induced cross-talk current between transformer windings. The apparatus includes a transformer having a first secondary winding that provides a first voltage relative to earth ground, a second secondary winding that provides a second voltage relative to floating ground, and a shield disposed between the first and second secondary windings. A correction circuit connected to the first secondary winding is configured to generate a correction voltage. The correction voltage drives a shield to induce a correction current into the second secondary winding to reduce cross-talk current induced between the first and second secondary windings.

主权项

1. An apparatus comprising:
a transformer comprising a primary winding, a first secondary winding configured to provide a first voltage responsive to a voltage applied to the primary winding, and a second secondary winding configured to provide a second voltage responsive to the voltage applied to the primary winding; a shield between the first and second secondary windings; and a correction circuit configured to generate a correction voltage responsive to the first voltage, wherein the correction voltage drives the shield to reduce cross-talk current induced between the first and second secondary windings.