rgou e ls l Assignee: Hughes Aircraft Company, Culver Primary Examiner-Rudolph Rolinec City, Calif Assistant Examiner-Saxfield C hatmon, Jr. United States Patent 1 1 Pond 1451 J541 CRYSTAL FILTER CIRCUIT WITH 3,613,Pond. H03H9/542- Filters comprising resonators of piezo-electric or electrostrictive material including passive elements.H03H9/54- Filters comprising resonators of piezo-electric or electrostrictive material.H03H9/00- Networks comprising electromechanical or electro-acoustic devices Electromechanical resonators.238000006011 modification reaction Methods 0.000 description 1.238000005859 coupling reaction Methods 0.000 description 1.235000011779 Menyanthes trifoliata Nutrition 0.000 description 1.241000499489 Castor canadensis Species 0.000 description 1.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co Priority to US18687371A priority Critical Application granted granted Critical Publication of US3737814A publication Critical patent/US3737814A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Hughes Aircraft Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US00186873A Inventor C Pond Current Assignee (The listed assignees may be inaccurate.
#Ful lattice crystal filter design pdf#
Google Patents Crystal filter circuit with sharply defined passband edgeĭownload PDF Info Publication number US3737814A US3737814A US00186873A US3737814DA US3737814A US 3737814 A US3737814 A US 3737814A US 00186873 A US00186873 A US 00186873A US 3737814D A US3737814D A US 3737814DA US 3737814 A US3737814 A US 3737814A Authority US United States Prior art keywords crystal coupled frequency parallel filter Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US3737814A - Crystal filter circuit with sharply defined passband edge US3737814A - Crystal filter circuit with sharply defined passband edge
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