摘要
介绍了基于LPC2132为主控芯片的数字信号发生器的设计方法,分别采用直接数字频率合成(DDS)芯片和可编程逻辑器件(CPLD)产生正弦波、方波和三角波,并设计了模拟信号放大与增益控制电路。通过键盘可方便的切换不同信号,实现了波形稳定、精度较高、幅频在规定范内可调的新型数字信号源。
A design method of the digital signal generator, based on LPC2132 as the master control chip, is introduced in this paper. The system has used of a chip of the direct digital frequency synthesizer （DDS） and a complex programmable logic device （CPLD） to produce the sine wave, square wave and triangle wave, and has designed circuits of analog signal amplification and gain control. Realized the switch of different signal through the keyboard, it is a new kind of the digital signal source, which has performances including stabilizing waveform, higher precision, adjustable amplitude and frequency on the permitted scope.
出处
《电子设计工程》
2012年第21期112-115,共4页
Electronic Design Engineering
基金
浙江省教育厅科研项目(Y201121031)
