专利内容由知识产权出版社提供
专利名称：Wide bandwidth bandpass filter comprising
parallel connected piezoelectric resonators
发明人：Lawrence Dworsky,Luke C. Bor Mang申请号：US07/827311申请日：19920129公开号：US052948A公开日：19940315
摘要：A plurality of piezoelectric resonators (10,32,37,57,62,66,79, 88,93) are utilizedto form a bandpass filter (31,56,78). The resonators (10,32, 37,57,62,66,79,88,93) areconnected in parallel to form a plurality of parallel paths between an input (43,73,81) andan output (47, 74,82) of the filter (31,56,78). A predetermined number of the piezoelectricresonators (10,32,37,57,62,66,79,88,93) provide a phase shift of approximately 180degrees. Each parallel path has a passband and center frequency that is displaced fromthe passband and center frequency of other paths. Consequently, the passband of eachparallel path algebraically sums and creates a filter passband that is wider than thepassband of each of the filter's individual parallel paths.
申请人：MOTOROLA, INC.
代理人：Robert F. Hightower,Joe E. Barbee
更多信息请下载全文后查看
