TRANSFORMER CIRCUIT FOR LIMITTING DIRECT CURRENT IN EXCHANGE

摘要

The circuit limits the DC current of primary of the transformer to lessen the transformer size. The AC impedance increases between collector and emitter of the transistor (TR) by base feeding of DC current. This permits no transformer prinary DC current and the saturation state and DC current causing magnetic flux can be eliminated, such that the transformer is driven only by AC sound signal, which produces high sound quality.