Time domain switched analog-to-digital converter apparatus and methods
US8952838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Aug 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/0682
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A time domain switching analog-to-digital converter apparatus and methods of utilizing the same. In one implementation, the converter apparatus comprises a carrier signal source, and at least one reference source. The carrier signal is summed with the input signal and the summed modulated signal is fed to a comparator circuit. The comparator is configured detects crossings of the reference level by the modulated waveform thereby generating trigger events. The time period between consecutive trigger events is used to obtain modulated signal deviation due to the input signal thus enabling input signal measurement. Control of the carrier oscillation amplitude and frequency enables real time adjustment of the converter dynamic range and resolution. The use of additional reference signal levels increases sensor frequency response and accuracy. A dual channel converter apparatus enables estimation and removal of common mode noise, thereby improving signal conversion accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.