一种大动态视频对数放大器的设计  

Design of a Large Dynamic Range Video Logarithmic Amplifier

作　　者：庞佑兵[1] 唐万军[1] 王若虚[1] 

机构地区：[1]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《微电子学》2006年第6期782-784,793,共4页Microelectronics

摘　　要：介绍了一种大动态范围视频对数放大器的设计,并给出了研制结果。该视频对数放大器是在自制单片IC基础上混合集成,单片IC采用PN结隔离双极工艺制作。经测试,该电路动态范围达84 dB、增益为75 dB、对数斜率为50 mV/dB、对数精度为±2 dB。A large dynamic range video log amplifier is presented. The design of the circuit is described and test results is provided. This video log amplifier is based on a monolithic IC, which is fabricated using PN junction isolation bipolar process by SISC, and all peripheral devices are integrated using hybrid IC process. Test results indicate the circuit has a log dynamic range of 84 dB, gain of 75 dB, log slope of 50 mV/dB and log error less than ±2 dB.

关 键 词：动态范围 直流耦合 集成视频对数放大器 负反馈 

分 类 号：TN453[电子电信—微电子学与固体电子学] TN722.12