Design of divider circuit for electrochemical impedance spectroscopy measurement system

• DOI: 10.1109/vlsi-dat.2018.8373225
• Publication Date: 2018-06-07T23:36:08Z
• Authors: Siang-Wei Wang; Tse-An Chen; Kuan-Hung Chen; Chia-Ling Wei
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

In an electrochemical impedance spectroscopy (EIS) measurement system, it needs to calculate the amplitude ratio between the reference signal and measured signal, which reqiures a divider. In this work, a chip, which cosists of peak detectors, a divider and other signal processing circuits, was proposed for the EIS measurement system. This chip is capable of obtaining the amplitude ratio of reference to measured signals. The chip was fabricated by using a 0.35μm CMOS/MEMS 2P4M mixed-signal polycide process, and the frequency of the input frequency can range from 10 Hz to 10 kHz.