基于CMOS的运算跨导放大器的电流镜电路仿真设计.doc

文档介绍：本科学生毕业论文
论文题目:
基于CMOS的运算跨导放大器的电流镜电路仿真设计
学院:
电子工程学院
年级:
08级
专业:
集成电路设计与集成系统
姓名:
刘秀春
学号:
20083511
指导教师:
邱成军
2012年 5 月 20日
摘要
由于VLSI技术的飞速进步,CMOS电路向着低压、低功耗、小尺寸方向发展,使得电压低、功率小CMOS电路成为目前研究的热点。CMOS跨导运算放大器的特点是电路结构简单,输出阻抗高,输出量是电流且不随负载变化;高频性能好,带通宽,增益通过控制端连续可调,所以基于CMOS电流输出的跨导运算放大器的仿真设计研究具有重要现实意义和应用价值。µmCMOS工艺的以电流镜为输出级的跨导运算放大器,其低阻抗节点可以有效地减小整个电路的功率损耗。采用Tspice软件对所设计的电路进行了仿真,而且完成了最后的版图绘制。所设计CMOS的运算跨导放大器仿真结果为:;;;°;/µs;~;;;;;;µm2,达到了预期设计的要求。
关键词
运算放大器;OTA;CMOS;版图
Abstract
Because of VLSI technology rapid progress, CMOS circuit to low pressure, low power consumption, small size direction development, make low voltage, power small CMOS circuit for the present research hot spot. CMOS transconductance characteristics of operational amplifier circuit structure is simple, high output impedance, output is current and not change with the load; High frequency performance is good, band-pass wide, gain through the control continuous adjustable, so CMOS based on the output current transconductance of operational amplifier simulation design research has important significance and application value. In this paper, based on the current CMOS process to µm for the output stage mirror transconductance operational amplifier, its low impedance nodes can be effectively reduced power loss of the whole circuit. Tspice software by the design of circuit simulation, pleted the last of the layout scale. The design of the CMOS operational transconductance amplifier simulation results for: working voltage of V; Voltage gain of dB; Units gain bandwidth for MHz; Phase allowance of °; A rate is v/us; mon-mode range of ~ V; Common mode rejection ratio dB; The power supply voltage depression than the dB; Output resistance for k, transconductance of mS;The power of mW; Layout