Load balancing circuit for a dual polarity power supply with single polarity voltage regulation

摘要

A load balancing circuit which operates to balance the output voltages of a dual polarity power supply with single polarity voltage regulation. The power supply outputs a positive voltage at a positive voltage with respect to a reference level and a negative voltage with respect to the reference level. The power supply further applies voltage regulation to a selected one of the positive and negative voltages and leaves the remaining one of the positive and negative voltages in an unregulated state. Positive and negative loads are coupled to receive the positive and negative voltages. The load balancing circuit detects a change in impedance of a selected one of the positive and negative loads and applies a corresponding impedance to the power supply to maintain the power supply in a nominally balanced state.