- / METHOD AND APPARATUS FOR CLOSED LOOP CONTROL OF SUPPLY AND/OR COMPARATOR COMMON MODE VOLTAGE IN A SUCCESSIVE APPROXIMATION REGISTER ANALOG TO DIGITAL CONVERTER

摘要

The embodiments described herein provide a method and apparatus for controlling the supply voltage for successive approximation register analog-to-digital converters and comparator common-mode voltages. The method includes measuring successive approximation register conversion times; Comparing successive approximation register conversion times to desired conversion times; And, if necessary, performing closed loop adjustment of at least one of the supply and / or the comparator common mode voltage. The device consists of a common-mode voltage and a regulator correction module. The common-mode voltage and regulator correction module includes a phase frequency detector, a charge pump, and may include a transconductance cell.