环形振荡器的设计.docVIP

目录 目录 1 摘要 2 Abstract 3 1 设计目的及任务要求 4 1.1 设计目的 4 1.2 任务要求 4 1.3 软件简介 4 2、工作原理 5 2.1 CMOS反相器电路 5 2.2静态CMOS反相器电路 5 2.3 CMOS反相器的特性 6 2.4 电压传输特性（VTC） 6 2.5 开关阈值 8 2.6 环形振荡器的工作原理 9 3、电路设计 12 4．仿真结果 14 心得体会 16 参考文献 17 摘要 振荡器是用来产生重复电子讯号（通常是正弦波或方波）的电子元件。其构成的电路叫振荡电路，能将直流转换为具有一定频率交流电信号输出。振荡器的种类很多，按振荡激励方式可分为自激振荡器、他激振荡器；按电路结构可分为阻容振荡器、电感电容振荡器、晶体振荡器、音叉振荡器等；按输出波形可分为正弦波、方波、锯齿波等振荡器。广泛用于电子工业、医疗、科学研究等方面。 三个非门或更多奇数个非门输出端和输入端首尾相接，构成环状以三个非门为例，即非门A输出端连接到非门B输入端，非门B输出端连接到非门C输入端，非门C输出端到连接非门A输入端，在其中任何一个连接的位置都可以引出输出信号。本文将围绕进行具有具体功能的振荡器的理论分析与设计。 关键词： Abstract Oscillator is used to generate repeated electrical signals (typically a sine wave or square wave) of the electronic components. Its circuit configuration is called an oscillation circuit, capable of DC into AC electrical output signal having a certain frequency. Many types of oscillators, according to the oscillation excitation can be divided into self-excited oscillator, he excited oscillator; according to the circuit structure can be divided RC-oscillator, LC oscillator, crystal oscillator, the tuning fork oscillators; according to output waveform can be divided into sine wave, square wave, sawtooth oscillator. Widely used in the electronics industry, medical and scientific research. Ring oscillator consisting of three or more odd number of NAND gate NAND gate output and the input of the end to end to form a ring. In three of the NAND gate as an example, i.e., the output of NAND gate A is connected to the B input of the NAND gate, the NAND gate B output connected to the input terminal of the NAND gate C, NAND gate C output to the A input of the NAND gate is connected, in which anywhere a connection can lead to the output signal. This article will focus on the ring oscillator oscillator has a specific function of the theoretical analysis and design. Keywords: IC inverter ring oscillator 1 设计目的及任务要求 1.1 设计目的 1.2 任务要求 本次设计将主要使用软件进行仿真。ORCAD Capture (以下以Capture代称)是一款基于Windows?操作环境下的电路设计工具。 利用Capture软件，能够实现绘制电路原理图以及为制作PCB和可编程的逻辑设计提供连续性的仿真信