Summary
International Symposium on Nonlinear Theory and Its Applications
2015
Session Number:A4L-B
Session:
Number:A4L-B-3
A Novel Capacitive-to-Digital Converter Interface Based on MemCapacitors for MEMS Capacitive Sensing Applications
Sondos H. Ismail, Ahmed H. Madian, Hassan Mostafa, Amr T. Abdel-Hamid,
pp.245-248
Publication Date:2015/12/1
Online ISSN:2188-5079
Summary:
This paper proposes a new 10-bit fully differential capacitance-to-digital converter (CDC) used in MEMS capacitive sensing applications based on memcapacitors. The proposed digital interface circuit is the voltage based-CDC technique; this achieves a direct physical property (capacitance) conversion into a digital output. The overall proposed design eliminates repeated blocks and can be used independent of the sensor type. The proposed architecture enhances the CDC performance and realizes minimized area due to memcapacitors. A performance comparison between conventional capacitor-based circuit and the circuit using memcapacitors is presented which indicates the same behavior but with an overall huge area reduction and enhanced power consumption. Cadence and LT-SPICE simulations are done using 90nm model with 1V single ended voltage supply. The current consumption at 1 KHz is 5.9 ﾎｼA.