JPH02118373U - - Google Patents

Info

Publication number
JPH02118373U
JPH02118373U JP1989026828U JP2682889U JPH02118373U JP H02118373 U JPH02118373 U JP H02118373U JP 1989026828 U JP1989026828 U JP 1989026828U JP 2682889 U JP2682889 U JP 2682889U JP H02118373 U JPH02118373 U JP H02118373U
Authority
JP
Japan
Prior art keywords
video
intermediate frequency
circuit
color
bandpass filter
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.)
Granted
Application number
JP1989026828U
Other languages
Japanese (ja)
Other versions
JP2515086Y2 (en
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 filed Critical
Priority to JP1989026828U priority Critical patent/JP2515086Y2/en
Priority to GB9003614A priority patent/GB2229877B/en
Priority to DE4006059A priority patent/DE4006059A1/en
Priority to KR1019900002911A priority patent/KR940010614B1/en
Publication of JPH02118373U publication Critical patent/JPH02118373U/ja
Application granted granted Critical
Publication of JP2515086Y2 publication Critical patent/JP2515086Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/647—I.F amplifiers
    • 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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Television Receiver Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例の映像中間周波処理
回路を示すブロツク図、第２図は第１図の映像中
間周波増幅回路に用いるバランス入力型増幅器を
説明する回路図、第３図は第１図の要部における
帯域特性を説明する説明図、第４図は従来の映像
中間周波処理回路を示すブロツク図、第５図は第
４図の要部における帯域特性を説明する説明図で
ある。 ２……チユーナ、３……第１のＰＳＦ回路、４
……第２のＰＳＦ回路、５……第１のＶＩＦ回路
、７……第１のＤＥＴ回路、８……映像出力端子
、９……ＡＧＣ回路、１０……第２のＶＩＦ回路
、１１……第２のＤＥＴ回路、１２……色・音声
出力端子。 FIG. 1 is a block diagram showing a video intermediate frequency processing circuit according to an embodiment of the present invention, FIG. 2 is a circuit diagram illustrating a balanced input type amplifier used in the video intermediate frequency amplification circuit of FIG. 1, and FIG. FIG. 4 is a block diagram showing a conventional video intermediate frequency processing circuit; FIG. 5 is an explanatory diagram explaining the band characteristics in the main part of FIG. 4. be. 2... Tuner, 3... First PSF circuit, 4
...Second PSF circuit, 5...First VIF circuit, 7...First DET circuit, 8...Video output terminal, 9...AGC circuit, 10...Second VIF circuit, 11... ...Second DET circuit, 12...Color/audio output terminal.

Claims (1)

【実用新案登録請求の範囲】 色帯域を含む所定の映像帯域特性を有し、チユ
ーナで周波数変換された映像キヤリア成分を通過
させる第１の帯域通過フイルタと、 所定の色・音声帯域特性を有し、前記チユーナ
で周波数変換され色・音声キヤリア成分を通過さ
せる第２の帯域通過フイルタと、 平衡入力型の増幅器で構成され、前記第１の帯
域通過フイルタから映像キヤリア成分を増幅する
第１の映像中間周波増幅回路と、 平衡入力型の増幅器で構成され、前記第２の帯
域通過フイルタから色・音声キヤリア成分を増幅
する第２の映像中間周波増幅回路と、 前記第１の映像中間周波増幅回路からの映像キ
ヤリア成分を検波する第１の検波回路と、 前記第２の映像中間周波増幅回路からの色・音
声キヤリア成分を検波する第２の検波回路と、 前記第１の検波回路の出力に基づいてＡＧＣ電
圧を発生し、前記第１の映像中間周波増幅回路及
び第２の映像中間周波増幅回路の利得を制御する
ＡＧＤ回路と、 を具備したことを特徴とする映像中間周波処理回
路。[Claims for Utility Model Registration] A first bandpass filter that has predetermined video band characteristics including a color band and that passes a video carrier component frequency-converted by a tuner; and a first band pass filter that has predetermined color and audio band characteristics. a second bandpass filter that passes the color and audio carrier components frequency-converted by the tuner; and a first bandpass filter that amplifies the video carrier component from the first bandpass filter and is composed of a balanced input amplifier. a video intermediate frequency amplification circuit; a second video intermediate frequency amplification circuit configured with a balanced input type amplifier and amplifying color/audio carrier components from the second bandpass filter; and the first video intermediate frequency amplification circuit. a first detection circuit that detects a video carrier component from the circuit; a second detection circuit that detects a color/audio carrier component from the second video intermediate frequency amplification circuit; and an output of the first detection circuit. A video intermediate frequency processing circuit comprising: an AGD circuit that generates an AGC voltage based on and controls gains of the first video intermediate frequency amplification circuit and the second video intermediate frequency amplification circuit.
JP1989026828U 1989-03-08 1989-03-08 Video intermediate frequency processing circuit Expired - Lifetime JP2515086Y2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1989026828U JP2515086Y2 (en) 1989-03-08 1989-03-08 Video intermediate frequency processing circuit
GB9003614A GB2229877B (en) 1989-03-08 1990-02-16 Video intermediate frequency processing circuit
DE4006059A DE4006059A1 (en) 1989-03-08 1990-02-26 VIDEO INTERFACE PROCESSING CIRCUIT
KR1019900002911A KR940010614B1 (en) 1989-03-08 1990-03-06 Image intermediate frequency signal processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989026828U JP2515086Y2 (en) 1989-03-08 1989-03-08 Video intermediate frequency processing circuit

Publications (2)

Publication Number Publication Date
JPH02118373U true JPH02118373U (en) 1990-09-21
JP2515086Y2 JP2515086Y2 (en) 1996-10-23

Family

ID=12204133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989026828U Expired - Lifetime JP2515086Y2 (en) 1989-03-08 1989-03-08 Video intermediate frequency processing circuit

Country Status (4)

Country Link
JP (1) JP2515086Y2 (en)
KR (1) KR940010614B1 (en)
DE (1) DE4006059A1 (en)
GB (1) GB2229877B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542725B2 (en) 1996-05-15 2003-04-01 Thomson Licensing S.A. Amplifier circuit arrangement for alternatively processing a digital or an analog signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232609A (en) * 1975-09-09 1977-03-12 Sony Corp Receiver
JPS54154889A (en) * 1978-05-26 1979-12-06 Kobe Steel Ltd Punching device for marking machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE393258A (en) * 1931-12-26
GB460675A (en) * 1935-11-27 1937-02-02 Gen Electric Co Ltd Improvements in or relating to television receivers and the like
US3787612A (en) * 1972-07-03 1974-01-22 Zenith Radio Corp Signal processing system for television receiver having acoustic surface wave devices for improved tuning and video demodulation
NL7300370A (en) * 1973-01-12 1974-07-12
US4660087A (en) * 1986-02-28 1987-04-21 Rca Corporation Video signal processing system with offset sound trap
US4718086A (en) * 1986-03-27 1988-01-05 Rca Corporation AGC in sound channel of system for processing a scrambled video signal
JP2675550B2 (en) * 1987-03-31 1997-11-12 株式会社東芝 Intermediate frequency processing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232609A (en) * 1975-09-09 1977-03-12 Sony Corp Receiver
JPS54154889A (en) * 1978-05-26 1979-12-06 Kobe Steel Ltd Punching device for marking machine

Also Published As

Publication number Publication date
DE4006059A1 (en) 1990-09-20
KR900015525A (en) 1990-10-27
GB9003614D0 (en) 1990-04-11
GB2229877A (en) 1990-10-03
JP2515086Y2 (en) 1996-10-23
KR940010614B1 (en) 1994-10-24
GB2229877B (en) 1993-09-01

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