Switched-mode AGC circuits with internally created reset module for burst-mode unbalanced data optical receiver  

作　　者：Wang Rong Wang Zhigong Wang Weibai Xu Jian Guan Zhiqiang 

机构地区：[1]Institution of RF-＆ OE-ICs of Southeast University, Nanjing 210096, P.R. China [2]Sino-Chip OEIC Jiangsu Co. Ltd, Nanjing 210016, P.R. China

出　　处：《High Technology Letters》2011年第3期317-324,共8页高技术通讯（英文版）

基　　金：Supported by the Natural Science Foundation of Jiangsu Province （ BK2010411 ） and the National International Cooperation Project of China-Korea （2011DFA11310）.

摘　　要：This paper presents an innovative switched-mode auto gain control （AGC） circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced （BMU） optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply.

关 键 词：burst-mode unbalanced （BMU） data optical receiver auto gain control （AGC） internally created reset module bit loss 

分 类 号：TN712[电子电信—电路与系统] TP873.024[自动化与计算机技术—检测技术与自动化装置]