信号发生器又称信号源或振荡器，在生产实践和科技领域中有着广泛的应用。能够产生多种波形，如三角波、锯齿波、矩形波（含方波）、正弦波的电路被称为函数信号发生器，其频率范围可从几个微赫到几十兆赫，除供通信、仪表和自动控制系统测试用外，还广泛用于其他非电测量领域。-Signal generator, also known as source or oscillator, in the field of production practices and technologies widely used. Can produce a variety of waveforms such as triangle wave, sawtooth, square wave (with square wave), the circuit is called sine function signal generator, the frequency range from a few tens of micro-Hz to MHz, in addition to communication , instrumentation and automatic control system testing, but also widely used in other non-electric measurement.