Abstract: An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a primary power circuit and a secondary power circuit. The primary power circuit receives an alternating current (AC) input power signal from an electrical power source and generates an intermediate direct current (DC) power signal. The intermediate DC power signal is generated at a first voltage level that is less than a voltage level of the AC input power signal. The secondary power circuit receives the intermediate DC power signal from the primary power circuit and delivers an output DC power signal to an electronic device. The output DC power signal is delivered at an output voltage level that is less than the first voltage level of the intermediate DC power signal.

Abstract: An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a primary power circuit and a secondary power circuit. The primary power circuit receives an alternating current (AC) input power signal from an electrical power source and generates an intermediate direct current (DC) power signal. The intermediate DC power signal is generated at a first voltage level that is less than a voltage level of the AC input power signal. The secondary power circuit receives the intermediate DC power signal from the primary power circuit and delivers an output DC power signal to an electronic device. The output DC power signal is delivered at an output voltage level that is less than the first voltage level of the intermediate DC power signal.

Abstract: A digital-to-analog converter (DAC) having a first sub-DAC for generating a coarse current level based upon the most significant bits of the digital input signal, and a second sub-DAC for generating a fine current level in response to the least significant bits of the digital input signal. The first sub-DAC is segmented, including a plurality of equally-sized current sources and self-calibration circuitry for calibrating the equally-sized current sources concurrently with generating the coarse current level. The second sub-DAC is itself partially segmented, wherein a first portion of the second sub-DAC includes a plurality of equally-sized current sources and a thermometer decoder associated therewith. The second sub-DAC further includes a plurality of binary-weighted current sources. Current levels generated by the first and second sub-DACs are summed to generate an analog equivalent of the digital input signal.