High-pass shaped dither in continuous-time residue generation systems for analog-to-digital converters
US11652491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2021 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Jul 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/164
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Mechanisms for reducing or eliminating a quantization error caused by a quantizer of a continuous-time (CT) residue generation system are disclosed. In particular, systems and methods described herein are based on using a dither generation and injection circuit that can perform a high-pass filtering of the additive dither signal (i.e., a high-pass shaped dither signal). Using high-pass shaped dither signals is expected to improve quantizer linearity without significantly reducing the available error correction range. The applied dither may be particularly effective at minimizing signal-dependent distortion in ADC output spectrum caused by the quantizer when the quantization error cancellation accuracy may be insufficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.