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

A method and apparatus for controlling supply voltage for a successive approximation register analog to digital converter and comparator common mode voltage. The method comprises: measuring a successive approximation register conversion time; comparing the successive approximation register conversio...

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Hauptverfasser: NAGARAJAN, Karthik, ALLADI, Dinesh, J
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method and apparatus for controlling supply voltage for a successive approximation register analog to digital converter and comparator common mode voltage. The method comprises: measuring a successive approximation register conversion time; comparing the successive approximation register conversion time with a desired conversion time; and if necessary, performing a closed loop adjustment of at least one of the supply and/or comparator common mode voltage. The apparatus consists of a common mode voltage and 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.