摘要
该信号发生器以单片机(89C51)为中心控制系统,由晶体振荡电路、地址产生电路(直接数字合成DDS)、波形产生电路、运算放大电路、功率放大电路及串行通讯电路组成。采用了直接数字频率合成技术,较大幅度的提高了输出波形的频率;可满足输出频率0.1 Hz^1 kHz的变化范围。波形数据的存储采用双端口RAM,使波形数据的输入输出相对独立,避免了系统总线隔离,使系统简单可靠。采用串行通讯电路可以直接方便的通过上位机改变波形的频率和幅值,确定输出波形的类型。
The signal generator based on the single-chip computer 89C51 was introduced.The signal generator consists of the microcontroller 89C51 the crystal osically circuit , the address maker cireuit（DDS）, the waveforms maker circuit, the operational amplifiers circuit, the power amplifier circuit and the serial communication circuit. In order to improve the frequeney of the output waveforms, the direct digital synthesizer was applied in this system. The range of frequency required is 0.1 Hz ～ 1 kHz. The date of waveforms was saved in two ports RAM, whieh make the input and output ports relatively independent. In order to change the frequency , value and the kinds of waveforms, the serial communication circuit was used.
出处
《仪表技术与传感器》
CSCD
北大核心
2007年第2期76-78,共3页
Instrument Technique and Sensor
