摘要
设计了一种可灵活在线调节的直接数字频率合成信号发生器,首先利用现场可编程门阵列生成各种频率、波形的信号数据,再采用LTC1821实现D/A转换,最后通过选择性滤波和功率放大电路实现信号输出,幅值范围0～10V,频率范围1Hz～100kHz,波形可设为三角波、矩形波、正弦波、锯齿波;实际测试验证了信号发生器的准确性和有效性。
A flexible online signal generator of direct digital synthesizer was designed. Firstly signal data with different frequency and waveform was produced via FPGA, then D/A conversion was carried out by LTC1821, finally signal output was gained after selective filter and power amplifier. The outputs with amplitude 0--10V and frequency 1Hz--100KHz were supplied, including triangle, rectangle, sine and sawtooth waveform. Its accuracy and efficiency have been confirmed in usage.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第12期3175-3177,3186,共4页
Computer Measurement &Control
