JPS5784611A - Surface acoustic wave filter - Google Patents

Surface acoustic wave filter

Info

Publication number
JPS5784611A
JPS5784611A JP16046780A JP16046780A JPS5784611A JP S5784611 A JPS5784611 A JP S5784611A JP 16046780 A JP16046780 A JP 16046780A JP 16046780 A JP16046780 A JP 16046780A JP S5784611 A JPS5784611 A JP S5784611A
Authority
JP
Japan
Prior art keywords
filter
transducer
coupler
surface acoustic
constitution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16046780A
Other languages
Japanese (ja)
Inventor
Yuji Kojima
Masaaki Ono
Noboru Wakatsuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16046780A priority Critical patent/JPS5784611A/en
Publication of JPS5784611A publication Critical patent/JPS5784611A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6406—Filters characterised by a particular frequency characteristic
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02866—Means for compensation or elimination of undesirable effects of bulk wave excitation and reflections

Abstract

PURPOSE:To avoid the effect of bulk waves and to achieve a filter with excellent characteristics, by locating in parallel an output transducer at a region other than the extension of an input transducer via a multistrip coupler, in a multichannel filter. CONSTITUTION:Surface acoustic waves generated 2 through the input of a composite signal from a tuner are converted for the transmission line with a linear coupler 3 and converted into electric energy. The energy is equally divided into transducers 4, 5 and greatly attenuates a sound carrier wave through a signal including carrier chrominance wave signals CC and video carrier wave PC. A filter consisting of the output transducer 5 passes through only the SC and PC and greatly attenuates signals other than the PC. The filter characteristics depend on the crossing width of reed screen electrode of each transducer and pitch and the like and an output signal is picked up from terminals 41-52. With this constitution, bulk waves passing through the coupler 3 do not give any effect on the output transducer and give excellent frequency characteristics and spurious characteristics.
JP16046780A 1980-11-14 1980-11-14 Surface acoustic wave filter Pending JPS5784611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16046780A JPS5784611A (en) 1980-11-14 1980-11-14 Surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16046780A JPS5784611A (en) 1980-11-14 1980-11-14 Surface acoustic wave filter

Publications (1)

Publication Number Publication Date
JPS5784611A true JPS5784611A (en) 1982-05-27

Family

ID=15715570

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16046780A Pending JPS5784611A (en) 1980-11-14 1980-11-14 Surface acoustic wave filter

Country Status (1)

Country Link
JP (1) JPS5784611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6484907A (en) * 1987-09-25 1989-03-30 Nec Corp Surface acoustic wave device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6484907A (en) * 1987-09-25 1989-03-30 Nec Corp Surface acoustic wave device

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