Patent ID: 6369735
Filing Date: 2002-04-09
Classification: H03M

Abstract:
A digital-to-analog converter which is configured to implement a scaling scheme wherein a signal level is digitally scaled before a digital-to-analog conversion and is scaled back after the conversion, thereby providing that the input mean power to the digital-to-analog converter is generally normalized, said digital-to-analog converter comprising a gain scaler, a Tx shaping filter connected to the gain scaler, at least one of a DAC and &Dgr;&Sgr; modulator connected to the Tx shaping filter, a 1-bit DAC connected to the modulator, and an analog filter connected to the 1-bit DAC, wherein said digital-to-analog converter is configured to control a gain of the gain scaler and a gain selection of the 1-bit DAC such that signal level is digitally scaled before a digital-to-analog conversion and is scaled back after the conversion and the input mean power to the digital-to-analog converter is generally normalized.