METHOD AND DEVICE FOR IMPROVING OUTPUT EFFICIENCY OF LINE DRIVER POWER

摘要

A method and an apparatus for improving power output efficiency of a line driver are disclosed. The method includes: obtaining a current working parameter of an xDSL subscriber board, where the current working parameter includes at least one of a working mode configured on a subscriber port of the xDSL subscriber board and current output power of the subscriber port; and determining, according to the current working parameter, a control signal for a line driver in the xDSL subscriber board and outputting the control signal, where the control signal includes: a first control signal, a second control signal, or a third control signal; the first control signal is used to control a minimum undistorted power supply voltage provided for the line driver, the second control signal is used to control a predetermined threshold level in a signal detection and charge pump circuit of the line driver, and the third control signal is used to control enabling/disabling of the signal detection and charge pump circuit. Through the foregoing technical solutions, the power output efficiency of the line driver in the xDSL subscriber board may be improved, thus reducing energy consumption of the xDSL subscriber board.