Patent · US Active

Second-order delta-sigma analog-to-digital converter

US8253613B2 · kind B2 · utility

3Cited by
3References
23Claims
0Family size

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Inventor

Key dates

Filing dateNov 30, 2010
Grant dateAug 28, 2012
Priority date—
Expiry dateJan 18, 2031

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01V8/20
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

In one embodiment, a second-order delta-sigma analog-to-digital converter (ADC) includes a second-order integrator adapted to second-order integrate a value at a first node, where the first node is coupled to an input of the ADC. The ADC also includes a comparator coupled to an output of the second-order integrator. The ADC further includes a digital-to-analog converter (DAC) coupled between an output of the comparator and the first node. The DAC is adapted to receive a digital output of the comparator and to generate a first charge or a second charge. The DAC includes a first charge pump adapted to produce the first charge and a second charge pump adapted to produce the second charge. The first and second charges are asymmetric.

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