Wideband CMOS Circuit Design Techniques for CD-ROM Analog Front End

• Main Authors: Ho, Sheng-yi, 何昇宜
• Other Authors: Wang, Chorng-Kuang
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/16204777356873880604

碩士 === 國立中央大學 === 電機工程學系 === 85 === As the computer multimedia is getting prevalent, the need of fast and high capacity storage media increases dramatically. Because of its high speed and capacity, CD-ROM is no doubt a very promising product. However, most of the CD-ROM driving circuits are implemented by BJT and the cost of BJT is expensive comparing to MOS. In this thesis, analog front end circuits using CMOS technology for application in high speed CD-ROM are proposed. These circuits can be utilized in forty- folds or higher CD-ROMs and thus can meet the rapid demand in the future. The AGC acquisition time can be adjusted by varying external resistors and capacitor of the loop filter and integrator to satisfy the requirement of different CD-ROM speed. The whole circuits are verified from post-layout simulations. The performance summary is as follows: The bandwidth is 85MHz and the total power consumption is 112mW (including transimpedance preamplifier, CFOA, open loop summing amplifier, and AGC) from a 3.3V power supply. The chip size is about 1.8mm$\times$1.7mm using TSMC 0.6$\mu$m SPDM CMOS technology.