JPS5678221A - Comb line type elastic surface wave device - Google Patents

Comb line type elastic surface wave device

Info

Publication number
JPS5678221A
JPS5678221A JP15438479A JP15438479A JPS5678221A JP S5678221 A JPS5678221 A JP S5678221A JP 15438479 A JP15438479 A JP 15438479A JP 15438479 A JP15438479 A JP 15438479A JP S5678221 A JPS5678221 A JP S5678221A
Authority
JP
Japan
Prior art keywords
electrodes
channel
output
wave device
receiver
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
JP15438479A
Other languages
Japanese (ja)
Inventor
Hitoshi Yanagihara
Seiji Kishimoto
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 JP15438479A priority Critical patent/JPS5678221A/en
Publication of JPS5678221A publication Critical patent/JPS5678221A/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
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression
    • 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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To display correctly the channel number of a TV receiver by providing comb teeth-shaped electrodes for side lobe removal that generate a nearly antiphase signal of a center frequency and amplitude nearly equal to those of a side lobe generated in a desired frequency range. CONSTITUTION:The UHF band channel display device of a tuner part has operating bands, high frequency band UH and low-frequency band UL, and is equipped with input electrodes 2a and 2b and output electrodes 3a and 4a, and 3b and 4b. Then, electrodes 2a and 2b are connected in parallel and connected to signal source 7, and output electrodes 3a, 4a, 3b and 4b are also connected in parallel and connected to load 10. Further, input electrode 12 for side-lobe removal and its output electrodes 13 and 14 are so formed that while the same center frequency and amplitude with the side lobes generated at electrodes 2a...4a, and 2b...4b can be obtained, output electric signals will be antiphase. Consequently, the channel number can be displayed correctly by using this device for the channel-number display device of a TV receiver.
JP15438479A 1979-11-30 1979-11-30 Comb line type elastic surface wave device Pending JPS5678221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15438479A JPS5678221A (en) 1979-11-30 1979-11-30 Comb line type elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15438479A JPS5678221A (en) 1979-11-30 1979-11-30 Comb line type elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS5678221A true JPS5678221A (en) 1981-06-27

Family

ID=15582951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15438479A Pending JPS5678221A (en) 1979-11-30 1979-11-30 Comb line type elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5678221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002001715A1 (en) * 2000-06-27 2002-01-03 Kabushiki Kaisha Toshiba Surface acoustic wave device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002001715A1 (en) * 2000-06-27 2002-01-03 Kabushiki Kaisha Toshiba Surface acoustic wave device
US6707352B2 (en) 2000-06-27 2004-03-16 Kabushiki Kaisha Toshiba Elastic surface wave device having parallel connected main and auxiliary filters

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