Invention Grant
- Patent Title: Capacitive proximity detection using delta-sigma conversion
- Patent Title (中): 使用delta-sigma转换的电容式接近检测
-
Application No.: US14301462Application Date: 2014-06-11
-
Publication No.: US09587964B2Publication Date: 2017-03-07
- Inventor: Keith Curtis
- Applicant: Microchip Technology Incorporated
- Applicant Address: US AZ Chandler
- Assignee: MICROCHIP TECHNOLOGY INCORPORATED
- Current Assignee: MICROCHIP TECHNOLOGY INCORPORATED
- Current Assignee Address: US AZ Chandler
- Agency: Slayden Grubert Beard PLLC
- Main IPC: G01R27/26
- IPC: G01R27/26 ; G01D5/24 ; H03K17/955 ; H03M3/00
Abstract:
Capacitive proximity detection is provided by combining a delta-sigma modulator and a capacitive voltage divider circuit to create a high resolution capacitive-to-digital converter. Period and duty cycle counters provide duty cycle ratios from the delta-sigma modulator for comparison of changes in capacitance values of a capacitive sensor when an object is in proximity thereto.
Public/Granted literature
- US20140368222A1 Capacitive Proximity Detection Using Delta-Sigma Conversion Public/Granted day:2014-12-18
Information query
