A 0.13 CMOS integrated circuit for electrical impedance spectroscopy from 1 kHz to 10 GHz

Abstract

The design of an electrical impedance spectroscopy acquisition and processing system using a 0.13 μm CMOS technology with a 1kHz to 10 GHz functional frequency range is presented. The system is based on a quadrature modulator in a lock-in architecture. The design of each one of the modules of the system is explained, and post-layout simulations are used to validate the main features of the design such as frequency response, gain, noise, linearity, and error characterization.