低压基准电压源电路的版图设计_毕业设计

摘要

集成电路版图是集成电路系统与集成电路工艺之间的中间重要环节，集成电路版图设计是指把一张经过设计的电路图转变为用于集成电路制造的光刻掩膜版图形，再经过相应的工艺加工制造出能够实际应用的集成电路芯片。版图设计的优劣直接影响电路生成的芯片的成品率及可靠性。而集成电路中的基准电压源可以在温度和电压不断变化的环境中保持相对稳定的参考电压,基准电压源的性能直接影响到整个系统的精度和性能。因此,低压基准电压源版图设计具有非常有意义。

本文基于Cadence软件版图设计平台,采用的是XiYue 3um 40V Bipolar Design Rule。设计的版图元件包括NPN、PNP、二极管、电阻、电容。本次设计的主要目的是熟练使用cadence版图设计软件，熟悉电路知识和版图设计规则，掌握基本元器件的内部结构及版图画法，学会布局布线及其优化，从而掌握版图设计方法。

本次设计的版图顺利通过DRC和LVS验证，表明本版图设计符合要求。

关键词 cadence软件,版图设计,TL431

Subject: The Layout Design of Low-voltage reference voltage source circui Specialty: Microelectronics

Name:Yuan XiaoWei (Signature)＿＿＿＿

Instructor:Liu ShuLin (Signature)＿＿＿＿

Abstract

The IC layout is in the middle of an essential link between the IC system

and integrated circuit technology. IC layout design is a design schematic into for use in integrated circuit manufacturing photolithography masks, graphics, and then through the corresponding process manufacturing to the practical application of the integrated circuit chip. The layout will directly affect the yield and reliability of the chips generated by the circuit. And the reference voltage source in the IC can maintain a relatively stable reference voltage in the changing environment of temperature and voltage, directly affects the accuracy and performance of the entire system. Therefore, the low voltage reference voltage source layout is incredibly meaningful.

The design is based on the Cadence software layout platform is Xi Yue 3um 40V Bipolar Design Rule. The design of the layout components includes NPN, PNP, diodes, resistance to, capacitors. The main purpose of this design is familiar with the cadence layout software, familiar with the circuit of knowledge and the layout design rules, to grasp the internal structure of the basic components and the version of the drawing method, and learn to layout optimization, in order to grasp the layout method.

The design of the territory passed DRC verification that edition map design to meet the requirements.

Key Words：Cadence, layout, tl431

目录

第一章绪论 (4)

1.1 选题背景及意义 (4)

1.2研究现状 (5)

1.3 本文工作 (5)

第二章版图设计原理 (6)

2.1版图设计方法 (6)

2.1.2半定制设计方法 (7)

2.1.3定制设计方法 (8)

2.2版图设计流程 (8)

2.3模拟电路设计方法 (9)

2.3.1器件对程设计 (9)

2.3.2无源元件匹配 (10)

2.3.3 优化布局连线 (10)

2.4集成电路设计技巧 (11)

第三章设计方案 (12)

3.1设计平台 (12)

3.1.1Cadence软件简介 (12)

3.1.2 Cadence软件使用说明 (13)

3.2低压基准电压源电路 (16)

3.2.1 TL431电路简介 (16)

3.2.2电路基本原理 (17)

3.2.3电路基本结构 (17)

3.3标准双极工艺 (18)

3.3.1工艺流程 (18)

3.4设计规则 (24)

第四章低压基准电压源电路的版图设计 (25)

4.1电路的设计 (25)

4.2电路主要器件的版图设计 (26)

4.2.1有源器件 (26)

4.2.2 无源器件设计 (29)

4.3 版图布局设计 (35)

4.4版图验证 (41)

第五章总结 (42)

致谢 (44)

参考文献 (45)