Patent · US Active

Signal processing for a capacitive sensor system with robustness to noise

US9279874B2 · kind B2 · utility

2Cited by

2References

28Claims

0Family size

Assignee

Microchip Technology Germany GmbH · DE

Inventors

Axel Heim · Munich, DE
Martin Hoch · Gilching, DE

Key dates

Filing date	Aug 14, 2013
Grant date	Mar 8, 2016
Priority date	—
Expiry date	May 30, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/9607
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A capacitive sensor includes a transmit electrode configured to provide an alternating electric field to a sensor; one or more receive electrodes for detecting variations in the alternating electric field; and an adaptive frequency adjustment unit configured to adjust an operating frequency of the alternating electric field responsive to detection of a noise measure, such as noise power.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.