Autonomous, multi-channel USB data acquisition transducers
US8838846B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/385
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit and method of analog data acquisition synchronization from an analog sensor in multiple channels associated with a USB hub. An analog to digital converter connected to the sensor that is part of a USB device has a time and phase corrected sampling clock that is referenced to a start-of-frame traffic signal with a preconfigured message indicating a time offset or delay seen upstream through a USB port. A plurality of similar devices are autonomously synchronized by the same message for multi-channel data acquisition by a locally generated trigger signal that allows a preset amount of delay set by the message. An accelerometer is a preferred sensor for such multi-channel data acquisition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.