摘要
波形发生器是电子设计以及教学、科研中应用最广泛的仪器之一。如果能用相对简单的实现方式和较少的成本产生具有优秀稳定度和精确度的常用波形,无疑将在这些领域中得到广泛的应用。在设计中应用芯片MAX038,辅以控制软件和特别的外围电路设计,就能实现一个低成本、多功能、高精度、输出频率连续可调的频率合成式波形发生器。根据MAX038的功能和结构特点,设计了控制程序和外围数模转换电路实现自动频率范围切换,避免了一般波形发生器需要手动切换频率范围且输出频率不够精确等弊病,对中低频波形发生器的设计有一定参考价值。
A waveform generator is one of the instruments most in use in electronic design,teaching and scientific research. If a low cost waveform generating circuit provides excellent stabilization and precision,it will be obviously wide used in the aspects above. In these designs,choosing an IC chip MAX038,a set of special control software and some particular hardware environment can produce a low cost,multifunction,precision frequency synthesized waveform generator which will provide a frequency output adjusted continuously. According to the functions and structure feathers of MAX038, additional control software, DAC circuit and digital auto frequency range switch circuit are designed to avoid troublesome manual switches and imprecise output frequency of most other generators. This provides a kind of reference design for low and middle frequency waveform generators.
出处
《现代电子技术》
2007年第1期68-70,共3页
Modern Electronics Technique
