Input tracking high-level multibit quantizer for delta-sigma ADC
US7397410B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Feb 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/452
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A quantization circuit includes a plurality of resistors, a plurality of tap points, and a plurality of coarse comparators. Each coarse comparator has a first input coupled to an input voltage and a second input coupled to a corresponding coarse tap point voltage. Each coarse comparator operates during a first phase to produce a “1” only if the input voltage exceeds the corresponding coarse tap point voltage. A plurality of fine comparators each have a first input coupled to the input voltage, and each fine comparator operates during a second phase to produce a fine output level indicative of whether the input voltage exceeds a corresponding tap point voltage of a group of tap points located immediately below the tap point connected to the highest coarse comparator producing a “1”.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.