Sigma-delta A/D converter
US6498573B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/496
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Sigma-delta A/D converter having at least one analog signal input (1, 2) for applying an analog input signal, a subtraction element (3) having a plurality of capacitors (20) for sampling the input signal during a sampling phase, it being possible during an integration phase to switch the capacitors (20) to reference voltage sources (7, 8, 9) depending on control signals, an integrator (10) for integrating the output signal of the subtraction element (3) during the integration phase, a quantizer (13) for analog-to-digital conversion of the output signal of the integrator (10) for outputting a digitized output signal to a digital signal output (14), and having a control logic element (16) for generating the control signals in such a way that the current load of the reference voltage sources (7, 8, 9) is minimized during the integration phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.