Development of Wireless Multichannel Microsystem for Neural Recording in Freely Moving Rat

• Main Authors: Chen, Yan-Jang, 陳彥璋
• Other Authors: Chiou, Jin-Chern
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/71021480570016873965

碩士 === 國立交通大學 === 電控工程研究所 === 100 === This thesis aims to develop an integrated wireless multichannel micro-system for various neural monitoring. Application of wireless transmission technology and miniaturized microsystem allow the freedom of moving objects without cables restriction. Presented work realized the integration of a low-noise 16-channel analog-front-end (AFE) chip with other commercial parts i.e. micro controller and RF module by chip-on-board (COB) method in a small-form-factor wireless multi-channel micro-system. Proposed design consists of four main parts: Low-noise low-power 16-channel AFE chip, micro controller, Bluetooth module and laptop software design. Surface mounted devices (SMD) were chosen to reduce circuit size with effective circuit layout techniques. To minimize noise interference of recorded physiological signals, four-layer board design is utilized to avoid noise coupling between analog and digital signals. In animal’s experiments, the system structure is divided into two parts, say Headstage and Main-Board, to meet the setup requirements for rat’s experiments. The Headstage was installed onto rat’s head for direct connection to the implanted electrodes, the Main-board is carried in a specially designed backpack on rat’s back. The overall system weights less than 13g without battery and is capable of simultaneous recording 16-channel signal at 300(max 1.25K)Hz sample rate and 12-bit resolution. Further works may include the wireless powering module and various stimulation’s design to realize a complete brain-computer interface.