| 应用于10Gb/s光接收机的全差分CMOS跨阻前置电路设计 |
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| 引用本文： | 王巍,武逶,冯其,颜琳淑,王川,王冠宇,袁军,王振. 应用于10Gb/s光接收机的全差分CMOS跨阻前置电路设计[J]. 红外与激光工程, 2015, 44(5): 1587-1592 |
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| 作者姓名： | 王巍 武逶 冯其 颜琳淑 王川 王冠宇 袁军 王振 |
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| 作者单位： | 1.重庆邮电大学 光电工程学院,重庆 400065 |
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| 基金项目： | 重庆市电子产业发展基金 |
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| 摘 要： | 设计了一种的低成本、低功耗的10 Gb/s光接收机全差跨阻前置放大电路。该电路由跨阻放大器、限幅放大器和输出缓冲电路组成,其可将微弱的光电流信号转换为摆幅为400 mVpp的差分电压信号。该全差分前置放大电路采用0.18 m CMOS工艺进行设计,当光电二极管电容为250 fF时,该光接收机前置放大电路的跨阻增益为92 dB,-3 dB带宽为7.9 GHz,平均等效输入噪声电流谱密度约为23 pA/(0~8 GHz)。该电路采用电源电压为1.8 V时,跨阻放大器功耗为28 mW,限幅放大器功耗为80 mW,输出缓冲器功耗为40 mW,其芯片面积为800 m1 700 m。
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| 关 键 词： | 光接收机 CMOS前置放大电路 跨阻放大器 限幅放大器 |
| 收稿时间： | 2014-09-24 |
Design of a fully differential CMOS transimpedance preamplifier for 10 Gb/s optical receiver |
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| Wang Wei,Wu Wei,Feng Qi,Yan Linshu,Wang Chuan,Wang Guanyu,Yuan Jun,Wang Zhen. Design of a fully differential CMOS transimpedance preamplifier for 10 Gb/s optical receiver[J]. Infrared and Laser Engineering, 2015, 44(5): 1587-1592 |
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| Authors: | Wang Wei Wu Wei Feng Qi Yan Linshu Wang Chuan Wang Guanyu Yuan Jun Wang Zhen |
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| Affiliation: | 1.College of Electronics Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China |
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| Abstract: | A low cost and low power consumption optical receiver differential transimpedance preamplifier for 10 Gb/s high-speed optical communications application was presented. The preamplifier includes a tranimpedance amplifier(TIA), limiting amplifier(LA), and output buffer, the weak photo-current was amplified by the preamplifier to a differential voltage swing of 400 mVpp. The preamplifier was designed in 0.18 m CMOS technology. The receiver preamplifier circuit is with a transimpedance gain of up to 92 dB and -3 dB bandwidth of 7.9 GHz, which accommodates a photodiode capacitor of 250 fF. The noise simulation result shows that the average input-referred noise current spectral density is 23 pA/up to 8 GHz. The power dissipation of transimpedance amplifier, limiting amplifier and output buffer respectively drain is 28 mW, 80 mW, and 40 mW from the 1.8 V supply respectively. The chip size is 800 m1 700 m. |
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| Keywords: | optical receiver CMOS preamplifier transimpedance amplifier limiting amplifier |
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