公开(公告)号：US3585537A

公开(公告)日：1971-06-15

申请号：US3585537D

申请日：1969-02-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： RENNICK ROBERT C ,  SMITH WARREN L

IPC: H03H9/54 ,  H03H9/56 ,  H03H9/60 ,  H03H9/32

CPC classification number: H03H9/545 ,  H03H9/542

Abstract: Multiresonator monolithic crystal structures are coupled to each other at predetermined coupling coefficients K by means of coupling capacitors that shunt the respective structure''s resonators to be coupled. The total capacitance coupling the resonators has a value CC C1/K where C1 is the equivalent motional capacitance of the resonators. The capacitor-coupled resonators, when uncoupled, exhibit frequencies f0 1-K, where f0 is the filter''s midband frequency.