Understanding Delta-Sigma Modulators

摘要

Delta-sigma analog-to-digital converters (ADCs) are fascinating— almost mythical in their ability to support low- to medium-speed and high-resolution applications. They take advantage of the speed of analog circuits, along with the robustness of digital circuits. They also reduce the amount of analog circuitry used in the converter. More importantly, the analog parts of the circuit don't need to be very accurate. Of course, the digital blocks then must work at higher sampling clocks and, thus, consume more power.