Patent ID: 6028486
Filing Date: 2000-02-22
Classification: H03F,H04L

Abstract:
A multi-carrier, line driving device for use in a digital subscriber line environment, comprising:a digital-to-analog converter receiving a digital input signal and converting the digital input signal into an analog input signal;an amplifier circuit, coupled to the digital-to-analog converter, receiving the analog input signal and generating an analog output signal;a first power supply capable of generating power at a first level;a second power supply capable of generating power at a second level greater than the first level; anda digital comparator comparing the digital input signal to a threshold, and as a result of the comparison, causing power to be supplied from the first power supply to the amplifier circuit when a magnitude of the digital input signal is less than a threshold and from the second power supply to the amplifier circuit when a magnitude of the digital input signal is greater than or equal to the threshold.