Patent ID: 6323686
Filing Date: 2001-11-27
Classification: H04B,H04L

Abstract:
A telephone line feed circuit for use with a telecommunication line, comprising:a) a first driver circuit having an output connected via a first transformer having a first turns ratio to a tip terminal and to a ring terminal of said telecommunication line;b) a second 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; andc) 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 circuit under normal input signal conditions and substantially all of the drive power is provided by the second driver circuit under high crest factor input signal conditions, the turns ratios of the first transformer and of the second transformer being selected such that signals driven onto the line via said first driver circuit and said second driver circuit are not clipped.