| Wang Rong(王蓉),Wang Zhigong,Wang Weibai,Xu Jian,Guan Zhiqiang.[J].高技术通讯(英文),2011,17(3):317~324 |
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| Switched-mode AGC circuits with internally created reset module for burst-mode unbalanced data optical receiver |
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| DOI： |
| 中文关键词: |
| 英文关键词: burst-mode unbalanced (BMU), data optical receiver, auto gain control (AGC), internally created reset module, bit loss |
| 基金项目: |
| Author Name | Affiliation | | Wang Rong(王蓉) | | | Wang Zhigong | | | Wang Weibai | | | Xu Jian | | | Guan Zhiqiang | |
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| 中文摘要: |
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| 英文摘要: |
| 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. |
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