Delta-sigma modulator having transconductor network for dynamically tuning loop filter coefficients
US9590590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Nov 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dynamically tunable transconductor includes a voltage-to-current converter stage for generating a current signal based on a voltage signal; and a current scaling stage for scaling the current signal by a scaling factor to achieve a particular transconductance. Current scaling stage includes a coarse tune mechanism having an associated coarse tune step and a fine tune mechanism having an associated fine tune step, where the scaling factor is a ratio of the coarse tune step to the fine tune step. A delta-sigma modulator can implement the transconductor to generate loop filter coefficients by dynamically tuning the transconductance to achieve a particular resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.