公开(公告)号：DE19900326A1

公开(公告)日：2000-11-23

申请号：DE19900326

申请日：1999-01-07

Applicant: EPCOS AG

Inventor： BAUERNSCHMITT ULRICH ,  EDER CLAUDIA

IPC: H03H9/145 ,  H03H9/64

Abstract: The filter arrangement is implemented on a chip and contains an input region (E) with one or more electrically parallel transversal mode resonator or TMR input filters (EA,EB) and an output region (A) with one or more parallel TMR output filters. The input and output regions are electrically connected in series via a coupling point (K) and have different numbers of filters. The input impedance differs from the output impedance. Active finger overlap of at least one resonator (R2EA,R1EB) adjacent to the coupling point and associated with one of the TMR filters is reduced for impedance matching at the coupling point

公开(公告)号：DE19900326C2

公开(公告)日：2001-06-07

申请号：DE19900326

申请日：1999-01-07

Applicant: EPCOS AG

Inventor： BAUERNSCHMITT ULRICH ,  EDER CLAUDIA

IPC: H03H9/145 ,  H03H9/64

公开(公告)号：DE10009511A1

公开(公告)日：2001-08-30

申请号：DE10009511

申请日：2000-02-29

Applicant: EPCOS AG

Inventor： EDER CLAUDIA ,  BERGMANN ANDREAS ,  JOHANNES THOMAS

IPC: H03H9/145 ,  H03H9/64 ,  H03H9/25

Abstract: The transversal mode resonance (TMR) filter has two electrically parallel connected TMR single tracks, each with at least two acoustically coupled half-tracks with a resonator containing an interdigital converter with stimulation cells and inactive finger groups. The stimulation cells are distributed in a single track so that the maximum density occurs in the center and the minima at the edge. The stimulation cells are weighted.