Wake-up receiver with automatic interference rejection
US9413403B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2014 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Oct 3, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A low power radio is provided with automatic interference rejection. The radio is comprised generally of: an antenna, a rectifier, a comparator, and a correlator. The comparator receives an input signal from the rectifier, compares the input signal to a reference signal and outputs a digital signal. The correlator in turn receives the digital signal from the comparator, correlates the digital signal to a wake-up code and outputs a wake-up signal having a high value when the digital signal is highly correlated with the wake-up code. The radio further includes an automatic threshold controller which adjusts sensitivity of the comparator. Of note, the rectifier, the comparator, the correlator and the automatic threshold controller are comprised in part by circuits having transistors operating only in subthreshold region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.