Analog-to-digital converter reusing comparator for residue amplifier for noise shaping
US10284213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2018 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Mar 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/468
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Some or all of a comparator circuit of an analog-to-digital converter (ADC) circuit can be efficiently repurposed or reused for residue amplification for efficient noise-shaping, e.g., in a noise-shaping feedback configuration. A preamplifier portion of a comparator circuit in an oversampling ADC can be re-purposed to provide an amplifier to amplify or otherwise modify a residue left after the bit trials of a conversion cycle. The amplified or modified residue can then be used elsewhere, for example, for noise-shaping by applying a noise transfer function (NTF), a result of which can then be fed back (e.g., summed with the next sampled input at an input of the comparator circuit for use in the N bit trials of the next ADC cycle).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.