带隙基准源电路与版图设计

论文题目：带隙基准源电路与版图设计

摘要

基准电压源具有相对较高的精度和稳定度，它的温度稳定性以及抗噪性能影响着整个系统的精度和性能。模拟电路使用基准源，或者是为了得到与电源无关的偏置，或者为了得到与温度无关的偏置，其性能好坏直接影响电路的性能稳定，可见基准源是子电路不可或缺的一部分，因此性能优良的基准源是一切电子系统设计最基本和最关键的要求之一，而集成电路版图是为了实现集成电路设计的输出。本文的主要目的是用BiCMOS工艺设计出基准源电路的版图并对其进行验证。

本文首先介绍了基准电压源的背景发展趋势及研究意义，然后简单介绍了基准电压源电路的结构及工作原理。接着主要介绍了版图的设计，验证工具及对设计的版图进行验证。

本设计采用40V的0.5u BiCMOS工艺库设计并绘制版图。仿真结果表明，设计的基准电压源温度变化为-40℃~~85℃，输出电压为2.5V及1.25V。最后对用Diva 验证工具对版图进行了DRC和LVS验证，并通过验证，表明本次设计的版图符合要求。

关键字：BiCMOS，基准电压源，温度系数，版图

I

Subject: Research and Layout Design Of Bandgap Reference

Specialty: Microelectronics

Name: Zhong Ting (Signature)＿＿＿＿Instructor: Liu Shulin (Signature)＿＿＿＿

ABSTRACT

The reference voltage source with relatively high precision and stability, temperature stability and noise immunity affect the accuracy and performance of the entire system. Analog circuit using the reference source, or in order to get the bias has nothing to do with power, or in order to be independent of temperature, bias, and its performance directly affects the performance and stability of the circuit shows that the reference source is an integral part of the sub-circuit, excellent reference source is the design of all electronic systems the most basic and critical requirements of one of the IC layout in order to achieve the output of integrated circuit design. The main purpose of this paper is the territory of the reference circuit and BiCMOS process to be verified.

This paper first introduces the background of the trends and significance of the reference voltage source, and then briefly introduced the structure and working principle of the voltage reference circuit. Then introduces the layout design and verification tools to verify the design of the territory.

This design uses a 40V 0.5u BiCMOS process database design and draw the layout.The simulation results show that the design of voltage reference temperature of -40 ° C ~ ~ 85 ° C, the output voltage of 2.5V and 1.25V. Finally, the Diva verification tool on the territory of the DRC and LVS verification, and validated, show that the territory of the design meet the requirements.

Keywords: BiCMOS，band gap , temperature coefficient, layout

II

目录

1 绪论 (1)

1.1 背景介绍及发展趋势 (1)

1.2 研究意义 (3)

1.3 本文主要工作 (4)

2 基准电压源电路设计 (5)

2.1 基准电压源的分类及特点 (5)

2.2 基准电压源的温度特性 (7)

2.2.1 负温度系数项

V (7)

BE

2.2.2 正温度系数电压 (7)

2.3 基本原理 (8)

2.3.1 与温度无关的电路 (8)

2.3.2.与电源无关的偏置电路 (8)

2.4 基准电压源电路设计 (9)

2.4.1 基本原理 (9)

2.4.2 运放的设计 (10)

2.4.3 带隙核心电路设计 (14)

2.5 仿真分析 (15)

3 版图设计 (19)

3．1 版图设计的基础 (19)

3.1.1 集成电路版图设计与掩膜版、制造工艺的关系 (19)

3.1.2 版图设计的设计规则 (20)

3.1.3 版图通用设计步骤 (23)

3.2工艺介绍 (24)

3.2.1 常见工艺简介 (24)

III