排序方式: 共有13条查询结果,搜索用时 15 毫秒
1.
2.
本文报告了两种声表面波(SAW)器件组成的频谱分析系统及其实验结果.使用SAW Chirp滤波器与SAW卷积器组成两种类似的实验系统,进行了连续波信号、调制脉冲信号、以及上述两种信号同时输入的谱分析,还进行了信号加窄带干扰的谱分析.两种系统获得一致的结果.实验表明,这些系统具有8MHz带宽,可分析10μs时宽的信号,其等效滤波器数目等于80.文内给出一些实验照片. 由SAW器件组成的谱分析系统是一种模拟信号处理系统.它具有结构简单、实时、时带积大、体积小、重量轻及功耗低等优点,是七十年代发展起来的,颇受人们的重视.我们在国内首次实现了由SAW Chirp滤波器或/和卷积器组成的两类系统. 相似文献
3.
4.
This paper is on the experimental study of the real-time air-gap coupled SAW convolver.Itwork at the center frequency of 60 MHz and its interaction length is 8 μs.It is degenerate.The mainperformance of our device features an external convolution efficiency of-57 dBm,a dynamic rangelarger than 70 dB and a convolution output power larger than-15 dBm(load 50 ohm). A new technique for the formation of the air-gap for this device has been developed in our la-boratory. In order to demonstrate the performance and functions of our SAW convolvers,three signalprocessing experiments have been carried out.These experimental results are satisfactory and showthat the SAW convolver can process both the analog and digital signals. 相似文献
5.
1977年10月17—26日,四机部在四川永川主持召开了全国首次表面声波技术交流会。有关的科研单位、高等院校及工厂参加了会议,来自全国各地的代表共107名。 这次会议的主要目的是交流经验,促进国内表面声波技术的发展。会议开得生动活泼,团结紧张。 会议共收到60篇报告文章。在大会上宣读13篇报告,其中10篇综述报告,从表面声波 相似文献
6.
7.
8.
9.
10.
This paper presents the experimental investigation on the effect of DC bias voltage on the con-volution efficiencies of air-gap coupled acoustoelectric convolvers made of various surface-treatedsilicon strips.For the silicon strips which are thermally oxidized to form 1000 A thick SiO_2,films andthen annealed in nitrogen atmosphere,there appear some new phenomena.We have derived theirtheoretical explanations,but these are only briefly mentioned in this paper. 相似文献