| 摘要 |
A method and an apparatus providing high level signals by summing partial signal currents and magnetomotive forces. In one embodiment, an isolation transformer having a 1:1 turns ratio and a plurality of separate primary windings is utilized. A plurality of independently controlled current generators are coupled to each separate primary winding with appropriate terminations such that the data communications circuit is impedance matched across the entire system. The isolation transformer sums the partial currents and magnetomotive forces in each separate primary winding such that a higher level high quality signal is produced in the secondary winding. As such, high quality high level data communications signals are produced with the described data communications circuit from low voltage level signals.
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