A 10 Gbit/s burst-mode preamplifier is designed for passive optical networks (PONs). To achieve a high dynamic range and fast response, the circuit is DC coupled, and a feed-back type peak detector is designed to pe...A 10 Gbit/s burst-mode preamplifier is designed for passive optical networks (PONs). To achieve a high dynamic range and fast response, the circuit is DC coupled, and a feed-back type peak detector is designed to perform auto-gaincontrol and threshold extraction. Regulated cascade (RGC) architecture is exploited as the input stage to reduce the input impedance of the circuit and isolate the large parasitic capacitance including the photodiode capacitance from the determination pole, thus increasing the bandwidth. This preamplifier is implemented using the low-cost 0. 13 ixm CMOS technology. The die area is 425 μm × 475 μm and the total power dissipation is 23.4 mW. The test results indicate that the preamplifier can work at a speed from 1.25 to 10.312 5 Gbit/s, providing a high transimpedance gain of 64.0 dBΩ and a low gain of 54. 6 dBl2 with a dynamic input range of over 22.9 dB. The equivalent input noise current is 23. 4 pA/ Hz1/2. The proposed burst amplifier satisfies related specifications defined in 10G-EPON and XG-PON standards.展开更多
电力线信道具有噪声强、衰减大的特点,信号通过信道后变化剧烈。OFDM电力线通信系统需要有效的增益控制策略。设计了一种两级调整结构的自动增益控制(AGC,auto gain control)方法,通过采用两级环路滤波能够有效应对信号突变,保证AGC的...电力线信道具有噪声强、衰减大的特点,信号通过信道后变化剧烈。OFDM电力线通信系统需要有效的增益控制策略。设计了一种两级调整结构的自动增益控制(AGC,auto gain control)方法,通过采用两级环路滤波能够有效应对信号突变,保证AGC的收敛速度和稳定性。同时加入能量检测单元,有效降低系统待机功耗。仿真结果表明,两级调整结构的AGC具有更好的收敛特性,能够满足电力线通信的要求。展开更多
基金The Key Technology Research and Development Program of Jiangsu Province ( No. BE2008128)
文摘A 10 Gbit/s burst-mode preamplifier is designed for passive optical networks (PONs). To achieve a high dynamic range and fast response, the circuit is DC coupled, and a feed-back type peak detector is designed to perform auto-gaincontrol and threshold extraction. Regulated cascade (RGC) architecture is exploited as the input stage to reduce the input impedance of the circuit and isolate the large parasitic capacitance including the photodiode capacitance from the determination pole, thus increasing the bandwidth. This preamplifier is implemented using the low-cost 0. 13 ixm CMOS technology. The die area is 425 μm × 475 μm and the total power dissipation is 23.4 mW. The test results indicate that the preamplifier can work at a speed from 1.25 to 10.312 5 Gbit/s, providing a high transimpedance gain of 64.0 dBΩ and a low gain of 54. 6 dBl2 with a dynamic input range of over 22.9 dB. The equivalent input noise current is 23. 4 pA/ Hz1/2. The proposed burst amplifier satisfies related specifications defined in 10G-EPON and XG-PON standards.
文摘电力线信道具有噪声强、衰减大的特点,信号通过信道后变化剧烈。OFDM电力线通信系统需要有效的增益控制策略。设计了一种两级调整结构的自动增益控制(AGC,auto gain control)方法,通过采用两级环路滤波能够有效应对信号突变,保证AGC的收敛速度和稳定性。同时加入能量检测单元,有效降低系统待机功耗。仿真结果表明,两级调整结构的AGC具有更好的收敛特性,能够满足电力线通信的要求。