JPS5718116A - Filter device - Google Patents

Filter device

Info

Publication number
JPS5718116A
JPS5718116A JP9275080A JP9275080A JPS5718116A JP S5718116 A JPS5718116 A JP S5718116A JP 9275080 A JP9275080 A JP 9275080A JP 9275080 A JP9275080 A JP 9275080A JP S5718116 A JPS5718116 A JP S5718116A
Authority
JP
Japan
Prior art keywords
filter
electrode
terminal
surface wave
output terminal
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
JP9275080A
Other languages
Japanese (ja)
Inventor
Jun Yamada
Takeshi Hazama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9275080A priority Critical patent/JPS5718116A/en
Publication of JPS5718116A publication Critical patent/JPS5718116A/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
    • H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
    • H03H9/72—Networks using surface acoustic waves
    • 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
    • H03H9/6413—SAW comb filters

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Television Receiver Circuits (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To make a device small-sized, by making a sound sampling filter a crystal filter of split electrode 3-terminal type, making a sampling filter of a video signal and a color signal an elastic surface filter, providing each filter on the same substrate, and connecting it to one common terminal and each separate output terminal. CONSTITUTION:On a piezoelectric substrate 11 is provided a 3-terminal type crystal filter 10 which consists of a filter having a lattice type electrode 8 for converting an electric signal to an elastic surface wave, and an electrode 9 for reconverting it to an electric signal, and a split electrode, and an output terminal 12 of a surface wave filter, and an output terminal 13 of the crystal filter 10 are made independent, respectively, by connecting the electrode 8 and the filter 10 to an input terminal 11. The electrode 8 is arranged so that an elastic surface wave is propagated in the direction of Z axis. The electrodes 8, 9 are of a double structure which consists of 19 pairs and has 7.1mum width, the center frequency is made 57.25MHz, and a video signal and a color signal are sampled simultaneously. Also, size of an electrode of the filter 10 is made 70mum, and a sound is sampled by utilizing a thickness and slip vibration mode. According to such a constitution, a device is made small-sized remarkably, and also the productivity is excellent.
JP9275080A 1980-07-09 1980-07-09 Filter device Pending JPS5718116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9275080A JPS5718116A (en) 1980-07-09 1980-07-09 Filter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9275080A JPS5718116A (en) 1980-07-09 1980-07-09 Filter device

Publications (1)

Publication Number Publication Date
JPS5718116A true JPS5718116A (en) 1982-01-29

Family

ID=14063087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9275080A Pending JPS5718116A (en) 1980-07-09 1980-07-09 Filter device

Country Status (1)

Country Link
JP (1) JPS5718116A (en)

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