Patent · US Active

Electronic device and method for measuring differential non-linearity (DNL) of an SAR ADC

US8665125B2 · kind B2 · utility

6Cited by

7References

12Claims

0Family size

Assignee

TEXAS INSTRUMENTS DEUTSCHLAND GMBH · DE

Inventors

Michael Reinhold · Munich, DE
Martin Allinger · Herzogenaurach, DE
Frank Ohnhaeuser · Stein, DE

Key dates

Filing date	Aug 8, 2012
Grant date	Mar 4, 2014
Priority date	—
Expiry date	Aug 8, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH03M1/804
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The device comprises a successive approximation register, a capacitive digital-to-analog converter comprising a plurality of capacitors, the plurality of capacitors being coupled with a first side to a common node; a comparator coupled to the common node and being adapted to make bit decisions by comparing a voltage at the common node with another voltage level, and a SAR control stage for providing a digital code representing a conversion result. The device is configured to operate in a calibration mode, where the device is configured to sample a reference voltage on a first capacitor of the plurality of capacitors by coupling one side of the first capacitor to the reference voltage, to perform a regular conversion cycle with at least those capacitors of the plurality of capacitors having lower significance than the first capacitor and to provide the conversion result of the regular conversion cycle for calibrating the first capacitor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.