REDUCED POWER LINE DRIVER

摘要

A telephone line feed circuit for use with a telecommunication line includes a transformer having a primary winding and a secondary winding wound with low resistance conductors, the primary for direct connection to a tip terminal and a ring terminal, and a driver circuit having an output connected to a secondary winding of the transformer for driving the transformer secondary winding directly with substantially no resistance therebetween while maintaining an impedance match between the telecommunications line and the telephone line feed circuit, to thereby reduce power consumption of the driver circuit. The present invention seeks to provide a line interface circuit that allows the significant reduction of driver power, namely up to about 50 %.