摘要
本文在介绍用 ＰＬＬ（Ｐｈａｓｅ－Ｌｏｃｋｅｄ Ｌｏｏｐ锁相环）电路进行频率跟踪的原理和实质的基础上，给出一种能够跟踪压电换能器并联谐振频率ｆｐ区间的具体电路，并通过实验研究了匹配电感和负载等对电路跟踪性能的影响．结果表明，这个电路具有很好的频率跟踪和功率自动调节性能．
Based on a discussion on the principle and essentiality of piezoelectric transducer's frequency tracking by the PLL circuit, a practical circuit for tracking the fp region is given. The effect of matching inductor and load on the circuit's tracking ca- pability was studied through experiment. The result shows that this circuit has a good performance in both frequency tracking and automatic power adjusting.
出处
《应用声学》
CSCD
北大核心
2001年第3期1-5,共5页
Journal of Applied Acoustics
