基于多条耦合器声表面波式小波重构器件的延时补偿方案  

Delay Time Compensation Scheme for Surface Acoustic Wave's Wavelet Reconstruction Device Based on Multistrip Coupler

作　　者：文常保[1] 朱长纯[1] 卢文科[1] 刘清洪[1] 刘君华[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2006年第8期945-949,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(60476037;60176020);教育部高等学校博士学科点专项科研基金资助项目(20020698014)

摘　　要：针对基于多条耦合器声表面波式小波重构器件中各个尺度器件之间时间不同步的问题,提出了补偿多条耦合器和输出叉指换能器之间距离来实现时间同步的延时补偿方案.该方案利用声表面波在晶体基片表面的延时特性,通过在声表面波器件内部进行延时补偿,确保了各个尺度重构器件在同一触发信号作用下具有相同的响应时间,解决了由于时间不同步造成的重构误差问题,避免了由于利用外部延时电路而增加器件的体积和功耗.对一个具有三尺度、基于多条耦合器声表面波式小波重构器件的延时补偿实验结果表明,该方案能够有效地解决不同尺度小波重构器件之间的时间不同步问题.To solve the time non-synchronization problem among different scale devices in surface acoustic wave＇s （SAW＇s） wavelet reconstruction devices based on multistrip coupler （MSC）, a novel delay time scheme of compensating the distance between MSC and output interdigital transducer is proposed. Time synchronization in different scale reconstruction devices has been realized by the delay time characteristic of surface acoustic wave propagating on crystal substrate surface. Realization of time synchronization ensures that all scale reconstruction devices have the same response time to the identical trigger signal, solves the reconstruction error due to time non-synchronization problem among different scale devices, and avoids increasing the volume and power of reconstruction devices using exterior delay circuits. The experiments of compensating a SAW＇ s wavelet reconstruction device based on MSC with three scales confirm that the time non-synchronization problem among different scale wavelet reconstruction devices can be solved by the delay time compensation scheme.

关 键 词：延时 时间同步 小波重构 声表面波 

分 类 号：TN65[电子电信—电路与系统] O426.9[理学—声学]