一种基于CMOS的光纤通信系统的设计

发布时间：2019-03-07 22:44

【摘要】：光纤通信在如今的通信方式中占有重要的地位。传输速度快,灵敏度高,误码率低的光纤通信系统,在数字设备之间的通信以及芯片之间的互连中得到了广泛的应用。本文提出了一种主要用于实现数字音像设备间通信的光纤通信系统的设计方法,借助于低损耗的信道光纤进行传输通信,有利于降低系统的误码率。主要设计了光纤通信系统的光发射端芯片、光接收端芯片,利用光纤通信技术实现了芯片之间的互连和通信。基于对光纤通信的研究,本文设计了一种传输速度快,灵敏度高的光纤通信系统,该系统主要应用于数字音频设备之间的相互通信。该系统主要由光发射机芯片XD3260,光接收机芯片XD3280以及塑料光纤组成。塑料光纤具有很小的传输损耗,使得通信距离比较长。在光发射机XD3260中的驱动电路中采用了延时补偿技术和温度补偿技术,提高了光发射机工作的稳定性,使光发射机具有很宽的操作电源电压和很好的温度特性。在光接收机XD3280中,放大器采用了跨阻前置放大器提高了光接收机的灵敏度和带宽;同时采用了自动增益控制(AGC)技术,使得前置跨阻放大器的增益伴随着接收到的光信号强度的增大而减小,从而增大了光接收机的动态输入范围;光接收机中的时钟恢复电路采用了双边迟滞的迟滞比较器,增强了系统的抗干扰能力;光接收机中的光电探测器选用了PIN光电二极管,提高了光电转换效率和响应速度。选用损耗很小的塑料光纤作为传输信道,降低了光在光纤中传输时的能量损耗。该系统基于光纤传输的基本原理和UMC 0.6μmCMOS工艺进行设计,采用Hspice仿真软件进行仿真验证。本文主要研究了如何提高光纤通信系统的传输速率,如何抑制通信过程中的噪声信号以及降低系统的误码率。利用Cadence软件的仿真工具Hspice进行了仿真验证,结果表明,这是一种高灵敏度、高传输速率、抗干扰能力强以及误码率低的光纤通信系统。
[Abstract]:Optical fiber communication plays an important role in today's communication mode. Optical fiber communication system with high transmission speed, high sensitivity and low bit error rate (BER) has been widely used in the communication between digital devices and the interconnection between chips. This paper presents a design method of optical fiber communication system, which is mainly used to realize the communication between digital audio and video devices. It is beneficial to reduce the bit error rate (BER) of the system by means of low loss channel fiber transmission. The optical transmitter chip and the optical receiver chip of the optical fiber communication system are designed. The interconnection and communication between the chips are realized by using the optical fiber communication technology. Based on the research of optical fiber communication, a high-speed and high-sensitivity optical fiber communication system is designed in this paper. The system is mainly used in the communication between digital audio devices. The system is mainly composed of optical transmitter chip XD3260, optical receiver chip XD3280 and plastic optical fiber. Plastic optical fiber has a small transmission loss, which makes the communication distance longer. In the drive circuit of optical transmitter XD3260, the technology of time delay compensation and temperature compensation are used to improve the stability of optical transmitter, so that the optical transmitter has a wide operating power supply voltage and good temperature characteristics. In the optical receiver XD3280, the amplifier adopts the trans-resistance preamplifier to improve the sensitivity and bandwidth of the optical receiver. At the same time, the automatic gain control (AGC) technology is used to reduce the gain of the preresistor amplifier with the increase of the received optical signal intensity, thus increasing the dynamic input range of the optical receiver. The clock recovery circuit in the optical receiver uses two-sided hysteresis comparator to enhance the anti-jamming ability of the system, and the photodetector in the optical receiver uses PIN photodiode, which improves the efficiency of photoelectric conversion and the response speed. The low loss plastic fiber is chosen as the transmission channel to reduce the energy loss of light transmission in the fiber. The system is designed based on the basic principle of optical fiber transmission and UMC 0.6 渭 m CMOS process, and is verified by Hspice simulation software. In this paper, we mainly study how to improve the transmission rate of optical fiber communication system, how to suppress the noise signal in the communication process, and how to reduce the bit error rate (BER) of the system. The simulation results show that it is a kind of optical fiber communication system with high sensitivity, high transmission rate, strong anti-jamming ability and low bit error rate (BER) by using the simulation tool Hspice of Cadence software.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.11

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