利用DAC设计数控信号发生器

The Design of Numberical Controlled Signal Generator by the Use of DAC

利用数模转换器可构成频率精度高并且可程控的信号发生器。本电路主要由计数器CD4029产生稳定的八路数字信号输出,经数模转换器AD7528输出模拟信号,再经运放变换,从电路的不同的输出端分别实现了三角波、矩形波、正弦波输出,从而实现了信号发生器的数字控制。

High frequency precision and program-controlled signal generator is designed by the use of DAC. Eight routes of steady digital signals are produced by CD4029 counter, and the digital signals are transformed to analog signals by DAC. After the analog signals are amplified by operation amplifier, the triangular wave, the rectangle wave and the sinusoidal wave can be gained frccn the different output end of circuit. Thus the digital control of signal generator is realized.