以晶振器为基准的新型信号发生器设计与分析

The Development of A Practical Signal Generator Based on a Crystal Oscillator

本文以高频率稳定性的晶体振荡器为基准，介绍了能同时产生方波和正弦波信号的信号发生器的设计思想、详细分析了２Ｎ阶阶梯正弦波的频谱结构，确定了该信号的谐波分布及幅度大小，并以８阶阶梯正弦波为例，给出了信号发生器的设计框图和完整电路，重点讨论了由ＣＣⅡ（－）构成的有源低通滤波器，给出了整个装置的理论和实验波形。

On the basis of crystal oscillators having high frequency stability,a new plan for designing a practical signal generator,which can simultaneously produce square waves and sinusoid signals, is recommended in this paper. Through a detailed analysis of the spectrum of 2N characteristic sine staircase waves, the harmonic distribution and amplitude are determined.The block diagram and circuit diagram of the signal generator are put forward based on the 8characteristic sine staircase waves. The low pass filter consisting of CC Ⅱ (-) is analyzed in detail. Finally, foe theory and the experimental waveforms of the whole set-up are put forward.