压控振荡器的电路设计1.docVIP

压控振荡器的电路设计 摘要 集成运算放大器品种多、性能优越、使用方便，而且由集成运算放大器组成的电路在体积、重量、耗电、寿命、可靠性及电性能等方面优于由分立器件组成的电路，因而其成为电子技术领域中不可缺少的器件，在电子电路中得到广泛的应用。压控振荡器（VCO）是一种振荡频率随外加控制电压变化的振荡器，是频率产生源的关键部件，已广泛应用于各种电子系统之中。本课题的主要研究内容是采用集成运算放大器设计压控振荡器的电路，包括压控锯齿波发生器电路、压控矩形波发生器电路、压控三角波发生器电路、压控方波发生器电路，并采用EWB对其进行仿真。仿真结果及分析表明，电路实现了其功能，并具有较好的性能。 EWB；信号频率；线性控制，集成放大器 CIRCUIT DESIGN OF VOLTAGE-CONTROLLED OSCILLATOR ABSTRACT Operational amplifier has many advantages such as various types, superior performance, and convenient usage. Integrated circuits composed of operational amplifiers are superior to those composed of discrete components in the size, weight, power consumption, longevity, reliability and electrical properties. Operational amplifier is an indispensable device in electrical circuits, and it is widely applied in electrical design fields. Voltage-controlled oscillator (VCO) is the device that its frequency changes with the voltage, which is the key part of generation of frequency, and it has been widely used in electronic systems. The main research topic in this paper is to design voltage-controlled oscillator circuits with operational amplifier, including circuits of voltage-controlled sawtooth wave generator , circuits of voltage-controlled rectangular wave generator, circuits of voltage controlled triangular wave generator, circuits of square-wave voltage generator. EWB is engaged to simulate the circuits. Simulation results and analysis show that the circuits have achieved their functions and they have good performances. Key words: VOC；EWB；Signal frequency；Linear controlIntegrated amplifier 目 录 1 绪论………………………..…………...…………………….………………………….1 1.1 压控振荡器原理及其发展现状………………………………………………………1 1.2 集成运算放大器的原理及其组成……………………………………………………5 1.3 论文构成及研究内容…………………………………………………………………6 2 EWB……………………………………………………………………………………….7 2.1 EWB概述...............................................................................................7 2.2 EWB对电路的仿真分析...........