Implantable medical device with low power delta-sigma analog-to-digital converter
US7623053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Oct 1, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/37
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In general, this disclosure describes techniques for reducing power consumption within an implantable medical device (IMD). An IMD implanted within a patient may have finite power resources that are intended to last several years. To promote device longevity, sensing and therapy circuits of the IMD are designed to incorporate an analog-to-digital converter (ADC) that provides relatively high resolution output at a relatively low operation frequency, and does so with relatively low power consumption. An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter (DAC) used for negative feedback. Such a configuration provides the benefits of higher resolution DAC feedback without having the use high oversampling ratios that result in high power consumption. Also, the techniques avoid the use of, and the associated high power consumption of, a high resolution flash ADC, within the sigma delta loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.