JPS5791083A - Surface acoustic wave filter for television receiver - Google Patents

Surface acoustic wave filter for television receiver

Info

Publication number
JPS5791083A
JPS5791083A JP16679080A JP16679080A JPS5791083A JP S5791083 A JPS5791083 A JP S5791083A JP 16679080 A JP16679080 A JP 16679080A JP 16679080 A JP16679080 A JP 16679080A JP S5791083 A JPS5791083 A JP S5791083A
Authority
JP
Japan
Prior art keywords
acoustic wave
surface acoustic
delay time
wave filter
electrodes
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
JP16679080A
Other languages
Japanese (ja)
Inventor
Yoshihiko Yasuhara
Teruo Kurokawa
Nobuki Yamaji
Kiyobumi Yamashita
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16679080A priority Critical patent/JPS5791083A/en
Publication of JPS5791083A publication Critical patent/JPS5791083A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To compensate a group delay time of high frequency component of a synthesized video signal at an audio trap circuit and to improve video quality, by hastening a group delay time characteristic of a surface acoustic wave filter used for an IF amplifying circuit at an approximate chrominance subcarrier frequency or lower. CONSTITUTION:On a major plane of a piezoelectric substrate 21 of a surface acoustic wave filter used for an intermediate frequency amplifying circuit of a TV set, input and output inter-digital electrodes 22 and 23 with an interval as input and output electro-surface wave conversion electrodes are formed with etching. Surface wave absorbing bands 24 and 25 are provided at a region outside the electrodes 22 and 23 of the surface wave propagation path opposing to the electrodes 22 and 23. The group delay time characteristic of the surface acoustic wave filter is designed so as to hasten at an approximate chrominance subcarrier frequency or lower, the group delay time of high frequency component of a synthesized video signal is compensated at an audio trap circuit and the video quality is increased.
JP16679080A 1980-11-28 1980-11-28 Surface acoustic wave filter for television receiver Pending JPS5791083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16679080A JPS5791083A (en) 1980-11-28 1980-11-28 Surface acoustic wave filter for television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16679080A JPS5791083A (en) 1980-11-28 1980-11-28 Surface acoustic wave filter for television receiver

Publications (1)

Publication Number Publication Date
JPS5791083A true JPS5791083A (en) 1982-06-07

Family

ID=15837714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16679080A Pending JPS5791083A (en) 1980-11-28 1980-11-28 Surface acoustic wave filter for television receiver

Country Status (1)

Country Link
JP (1) JPS5791083A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59121976U (en) * 1983-02-03 1984-08-16 パイオニア株式会社 Multiple information recording device
JPS6022882A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Television reciever
FR2595176A1 (en) * 1986-02-28 1987-09-04 Rca Corp SYSTEM FOR PROCESSING VIDEO SIGNALS WITH TRAPS OFFSET OF SOUND
JPS6397969U (en) * 1986-12-17 1988-06-24

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391529A (en) * 1977-01-24 1978-08-11 Hitachi Ltd Color television picture receiver
JPS55151810A (en) * 1979-05-15 1980-11-26 Murata Mfg Co Ltd Elastic surface wave filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391529A (en) * 1977-01-24 1978-08-11 Hitachi Ltd Color television picture receiver
JPS55151810A (en) * 1979-05-15 1980-11-26 Murata Mfg Co Ltd Elastic surface wave filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59121976U (en) * 1983-02-03 1984-08-16 パイオニア株式会社 Multiple information recording device
JPS6022882A (en) * 1983-07-18 1985-02-05 Matsushita Electric Ind Co Ltd Television reciever
JPH0120596B2 (en) * 1983-07-18 1989-04-17 Matsushita Electric Ind Co Ltd
FR2595176A1 (en) * 1986-02-28 1987-09-04 Rca Corp SYSTEM FOR PROCESSING VIDEO SIGNALS WITH TRAPS OFFSET OF SOUND
JPS6397969U (en) * 1986-12-17 1988-06-24

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