简易信号发生器的故障分析与解决方法  

Fault analysis and elimination method of simple signal generator

作　　者：张慧敏[1] 

机构地区：[1]常州信息职业技术学院,电子与电气工程学院,江苏常州213164

出　　处：《现代电子技术》2014年第6期108-109,113,共3页Modern Electronics Technique

摘　　要：在此通过对简易信号发生器的设计和调试,发现其产生的正弦波、方波和三角波均存在不同程度的失真。为了改善频率较大时方波产生的失真情况,采用高速率运放或者减小正弦波的频率来解决。为了改善三角波的失真情况,采用增大积分电阻R或者积分电容C,也可以采用减小方波的幅值,即在过零比较器的输出端接双向稳压管,限制输出方波的幅度在一定范围内。经过分析和改进,完善了简易信号发生器的设计,改善了3种波形的失真情况。Some distortion phenomena of sine wave,square wave and triangular wave produced by the simple signal genera-tor were found in the debugging and design process of the simple signal generator. The high-frequency distortion of square wave can be reduced by adopting the high-speed operational amplifier or by reducing the frequency of sine wave. As for the triangular wave’s distortion,the integral resistor R or integral capacitor C is enhanced,or the square wave’s amplitude is decreased. That is,a two-way voltage-regulator tube is connected with output end of the zero-crossing comparator to limit the square wave’s am-plitude in a certain range. After analysis and improvement,the design of a simple signal generator was fulfilled perfectly,and the three waves’distortion was restrained at a certain extent.

关 键 词：信号发生器 故障分析 故障排除方法 过零比较器 

分 类 号：TN964-34[电子电信—信号与信息处理]