State-delayed technique and system to remove tones of dynamic element matching
US6720897B1 · kind B1 · utility
8Cited by
7References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 2003 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter structure used with a dynamic element matching encoder for a sigma-delta digital-to-analog converter is presented. A sampled input sequence having undesired frequency tones is divided into even and odd data sub-sequences. Each of the sub-sequences is processed by a dynamic element matching encoder, with a transfer function H(z−1). The resulting processed sub-sequences are combined into an output sequence. The undesired frequency tones are substantially reduced in the output sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.