【作者】 李俊一；

【导师】 牛萍娟；

【作者基本信息】 天津工业大学 ， 信号与信息处理， 2007， 硕士

【摘要】 随着社会的发展，信息交换量与日俱增。近年来，以光波为载体、光纤为传输媒质的光纤通信异军突起，发展十分迅速，已成为信息高速公路的主体。光纤通信具有容量大、传输距离远、节省能源、抗干扰、抗辐射等诸多优点，开发具有自主知识产权、用于光纤传输的高速集成电路对我国信息化建设具有重大意义。在用于光纤传输系统的几个功能电路中，构成光接收机前端放大电路的前置放大器和主放大器是两个关键电路。本次课题的任务是采用0.35μm CMOS工艺实现适用于光纤传输系统高速率级的前置放大器和主放大器，并实现该光接收机前端放大电路的单片集成。作为光接收机的关键部分，前置放大器的性能在很大程度上决定了整个光接收机的性能。在高速光纤传输系统中，广泛应用跨阻前置放大器。本文采用了电感并联峰化技术来提高跨阻前置放大器的带宽。利用Cadence Spectre仿真软件进行了模拟，给出后仿真结果。主放大器有两种实现方式：自动增益控制放大器和限幅放大器。由于限幅放大器具有设计简单、功耗低、芯片面积小和外接元件少的优点，我们选用限幅放大器的形式来实现光接收机的主放大器。限幅放大器的宽带放大单元采用带有可调节共源共栅和有源电感负载的差分对结构以获得高的增益带宽积。提出了一种用于多级宽带放大器的功耗优化方法。利用Cadence Spectre仿真软件进行了模拟，给出前仿真结果。将光接收机前端放大电路单片集成，利用Cadence Spectre仿真软件进行了模拟，给出前仿真结果。版图设计是芯片设计的重要步骤，文中详细介绍了高速芯片版图设计的注意点和设计技巧。其中，跨阻前置放大器的版图设计有一定的突破。文章按照电路设计、版图设计、工艺流片到最后芯片测试方案构想和系统搭建的顺序详细介绍了上述电路的设计过程。全部电路经模拟验证符合设计要求，并给出了跨阻前置放大器芯片的简单测试结果。更多还原

【Abstract】 With the rapid development of telecommunication networks, computer networks and Internet, it is urgent to build information super-highway. Optic-fiber communication systems are the principal parts of information super-highway for its merits such as great capacity, long transmit distance, economizing energy source, anti interference and anti radiation etc. Thus, it is very important to design high speed integrated circuits for optical transmission systems with independent property.In the building blocks of an optical transmission system, the pre-amplifier and the main amplifier are the critical parts. The task of this project is to design a preamplifier and a main amplifier for high speed optical receiver using 0.35μm CMOS technology and try to integrate the front-end amplifier monolithically.The performance of a preamplifier has great effect on the performance of an optical receiver. Trans-impedance pre-amplifier are widely used in the high speed optical transmission systems. The bandwidth of the trans-impedance is extended using the inductive peaking technique. The post-simulated results are presented finally with the help of Cadence Spectre software tool.An auto Gain Control (AGC) amplifier or a limiting amplifier is generally used to realize the main amplifier. The latter one was chosen to realize the main amplifier in our design since it has the feature such as simple topology, few external components and fast responsibility. A source coupled pair with regulated cascade and inductive loads is used as the basic wide-band amplification cell to achieve a higher gain-bandwidth product. A power optimization methodology for a multistage wide band amplifier has been proposed. The pre-simulated results are presented finally with the help of Cadence Spectre software tool.The front-end amplifier is integrated monolithically. The pre-simulated results are presented finally with the help of Cadence Spectre software tool.Layout design is an important step in chip design flow and the skills for high-speed layout design are described. Of all, there is a breakthrough in the layout design of the trans-impedance.In this paper, we describe the procedures of design of the chip as follows: circuit design, the layout design and chip fabrication and conceive of test scheme and test system building. The simulated results of the circuits validate our design specification. And the simple test results of the transimpedance preamplifier chip are given.更多还原