CREST FACTOR COMPENSATED DRIVER

摘要

A telephone line feed circuit for use with a telecommunication line, comprising a first driver circuit having an output connected via a first transformer having a first turns ratio to a tip terminal and a ring terminal of said telecommunication line, a seco nd driver circuit having an output connected via a second transformer having a second turns ratio to the tip terminal and the ring terminal of said telecommunication line, and a switching circuit arranged to provide an input signal to said driver circuits so that substantially all of the drive power is provided by said first driver under normal input signa l conditions and substantially all of the drive power is provided by the second driver under high crest factor input signal conditions while the turns ratios of the transformers ar e selected such that the signal driven onto the line is not clipped.