Sensor data acquisition system with integrated power management
US9634567B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Nov 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microelectromechanical systems (MEMS) sensor with an integrated power management system that performs analog to digital conversion of weak signals is provided. The MEMs sensor can include a switching regulator that steps a supply voltage down to a voltage appropriate for an analog to digital converter (A/D converter). A timing circuit is provided to generate a clock frequency for the switching regulator and the A/D converter such that the clock frequencies are harmonically related. The frequency of the voltage ripples formed by the switching regulator will match the clock frequency provided to the switching regulator. When the sampling frequency of the A/D converter is harmonically related to the voltage ripple frequencies, the aliasing frequency will fall outside a range of frequencies associated with the analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.