Patent · US Active

Methods and apparatus for calibrating pipeline analog-to-digital converters

US8754794B1 · kind B1 · utility

16Cited by
16References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 25, 2012
Grant dateJun 17, 2014
Priority date
Expiry dateJul 25, 2032

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03M1/164
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

An integrated circuit with a pipeline analog-to-digital (A/D) converter and associated calibration circuitry is provided. The A/D converter may include multiple series-connected pipeline stages at least some of which are implemented using a switched capacitor configuration. The calibration circuitry may include an analog error correction circuit, a digital error correction circuit, and a calibration control circuit for coordinating the operation of the analog and digital error correction circuits. During calibration operations, the analog error correction circuit may be used to suitably adjust a gain setting for each pipeline stage, whereas the digital error correction circuit may be used to compute a code offset value for each pipeline stage. Calibration may proceed from a least-significant-bit pipeline stage towards a most-significant-bit pipeline stage, one stage at a time.

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