Digital tuning scheme for continuous-time sigma delta modulation
US6693572B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2003 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Feb 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/456
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for a digital tuning scheme for continuous-time sigma-delta modulation. The method includes integrating a voltage from a voltage source using a discrete-time integrator to produce a discrete-time integrator output, continuous-time integrating a current from a controllable current source to produce a continuous-time integrator output, quantizing the difference between the continuous-time integrator output and the discrete-time integrator output to produce a quantizer output, controlling a polarity of the controllable current source with the quantizer output, counting the quantizer output to produce a feedback signal, and tuning the controllable current source as a function of the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.