Analog to Digital Converter in FMCW radar system

• Main Authors: Sheng-Jie Huang, 黃勝傑
• Other Authors: Chun-Wei Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/69947261970069645174

碩士 === 雲林科技大學 === 電子與資訊工程研究所 === 98 === In contrast to the Pulse Radar system, the Frequency-Modulated Continuous Wave (FMCW) Radar system is popularly used to many applications, especially for small and lightweight Radar sensor. By the improvement in semiconductor process, radio frequency circuit and digital circuit are possible to be combined and implemented into a single SOC chip. More important, the analog to digital converter is always used to be an interface in data conversions. In this work, we propose a 3.3V, 8-bit, 10MSampling/s Analog-to-Digital converter applied for the FMCW radar application. The proposed Analog-to-Digital converter is based on Sub-ranging architecture and is composed of a 4-bit coarse-tuned ADC and a fine-tuned ADC. The proposed ADC converter had been fabricated by TSMC 1P6M 0.18μm CMOS technology and the whole chip area with I/O PAD is 1.7 x 1.6 mm2. The overall system consumes less than 91mW with 3.3V supply voltage.