A Wireless Capsule Endoscope System With Low-Power Controlling and Processing ASIC

作者：Chen Xinkai^*; Zhang Xiaoyu; Zhang Linwei; Li Xiaowen; Qi Nan; Jiang Hanjun; Wang Zhihua

来源：IEEE Transactions on Biomedical Circuits and Systems, 2009, 3(1): 11-22.

DOI：10.1109/TBCAS.2008.2006493

• Application specific integrated circuit (ASIC)
• image compression
• JPEG-LS
• low power
• power management unit
• wake-up
• wireless capsule endoscope

This paper presents the design of a wireless capsule endoscope system. The proposed system is mainly composed of a CMOS image sensor, a RF transceiver and a low-power controlling and processing application specific integrated circuit (ASIC). Several design challenges involving system power reduction, system miniaturization and wireless wake-up method are resolved by employing optimized system architecture, integration of an area and power efficient image compression module, a power management unit (PMU) and a novel wireless wake-up subsystem with zero standby current in the ASIC design. The ASIC has been fabricated in 0.18-mu m CMOS technology with a die area of 3.4 mm * 3.3 mm. The digital baseband can work under a power supply down to 0.95 V with a power dissipation of 1.3 mW. The prototype capsule based on the ASIC and a data recorder has been developed. Test result shows that proposed system architecture with local image compression lead to an average of 45% energy reduction for transmitting an image frame.

• 出版日期2009-2
• 单位清华大学