By Topic

A wide dynamic range and fast update rate integrated interface for capacitive sensors array

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Xu Zhang ; Inst. of Microelectron., Tsinghua Univ., Beijing, China ; Ming Liu ; Hong Chen ; Chun Zhang
more authors

A low-power CMOS capacitance-to-digital converter for capacitive sensors array is presented. It consists of a 16-channel MUX, a front-end with wide dynamic range for capacitance-voltage conversion and a novel voltage-pulses convertor. This novel circuit charges the measured capacitor indirectly and converts it into a proportional voltage, and then produces a 16-bits pulses-formed single-line output with multi-steps quantization method. The circuit can operate under 1.2V to 3.6V voltage supply for single battery application. The maximum input is 350pF with 0.75ms/ch update rate and 90μA power consumption when the operating clock is 100KHz. The chip has been design and fabricated in 0.18-μm 1P6M CMOS process with active area of 640×630μm2.

Published in:

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Date of Conference:

20-23 May 2012