Dynamic-zoom analog to digital converter (ADC) having a coarse flash ADC and a fine passive single-bit modulator
US10541706B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2018 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | May 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dynamic-zoom analog to digital converter (ADC) having a coarse flash ADC and a fine passive single-bit modulator is disclosed. Radio frequency (RF) devices incorporating aspects of the present disclosure may support multiple wireless modes operating at different frequencies. Therefore, the RF devices have need for an ADC which is flexible and optimizable in terms of resolution, bandwidth, and power consumption. In this regard, the RF devices incorporate circuits, such as ADC circuits, which incorporate a discrete-time passive delta-sigma modulator. In order to improve the resolution of the delta-sigma modulator, a coarse ADC is deployed as a zooming unit to a single-bit passive delta-sigma modulator to provide a coarse digital conversion. Coarse conversion is used to dynamically update reference voltages at an input of the delta-sigma modulator using a multi-bit feedback digital to analog converter (DAC). The dynamic-zoom ADC supports multiple modes with improved power and quantization noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.