JPS63102373U - - Google Patents

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Publication number
JPS63102373U
JPS63102373U JP19643486U JP19643486U JPS63102373U JP S63102373 U JPS63102373 U JP S63102373U JP 19643486 U JP19643486 U JP 19643486U JP 19643486 U JP19643486 U JP 19643486U JP S63102373 U JPS63102373 U JP S63102373U
Authority
JP
Japan
Prior art keywords
video
tuning
circuit
signal
detuning
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
JP19643486U
Other languages
English (en)
Other versions
JPH0756544Y2 (ja
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 JP1986196434U priority Critical patent/JPH0756544Y2/ja
Publication of JPS63102373U publication Critical patent/JPS63102373U/ja
Application granted granted Critical
Publication of JPH0756544Y2 publication Critical patent/JPH0756544Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Television Receiver Circuits (AREA)

Description

【図面の簡単な説明】
第１図は、本考案の一実施例を示す回路図、第
２図は従来のビデオ同期検波回路を示す回路図、
及び第３図は第１図の説明に供する為の波形図で
ある。 ３…ビデオ検波器、４…位相比較器、５…ロー
パスフイルタ、６…ＶＣＯ、２４…ＩＦＡＧＣ回
路、２３…第１差動増幅回路、２５…第２差動増
幅回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. ＶＣＯ、位相比較器、及びローパスフイルタか
    ら成るＰＬＬ回路の出力信号を用いて、ビデオＩ
    Ｆ信号を同期検波するビデオ同期検波回路におい
    て、検波されたビデオ信号のレベルを検出し、前
    記ローパスフイルタの時定数を離調時に大、同期
    時に小となる様に切換える同調・離調判別回路と
    、受信信号の電界強度を検出し、同調時で弱電界
    のとき前記ローパスフイルタの時定数が大となる
    様に前記同調・離調判別回路の動作を制御する制
    御回路とを備えることを特徴とするビデオ同期検
    波回路。
JP1986196434U 1986-12-19 1986-12-19 ビデオ同期検波回路 Expired - Lifetime JPH0756544Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986196434U JPH0756544Y2 (ja) 1986-12-19 1986-12-19 ビデオ同期検波回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986196434U JPH0756544Y2 (ja) 1986-12-19 1986-12-19 ビデオ同期検波回路

Publications (2)

Publication Number Publication Date
JPS63102373U true JPS63102373U (ja) 1988-07-04
JPH0756544Y2 JPH0756544Y2 (ja) 1995-12-25

Family

ID=31155250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986196434U Expired - Lifetime JPH0756544Y2 (ja) 1986-12-19 1986-12-19 ビデオ同期検波回路

Country Status (1)

Country Link
JP (1) JPH0756544Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344280A (ja) * 1989-07-12 1991-02-26 Mitsubishi Electric Corp 映像中間周波信号処理回路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880903A (ja) * 1981-11-09 1983-05-16 Matsushita Electric Ind Co Ltd テレビジヨン信号処理装置
JPS5896406A (ja) * 1981-12-03 1983-06-08 Matsushita Electric Ind Co Ltd バイアス回路
JPS5896404A (ja) * 1981-12-04 1983-06-08 Hitachi Ltd 同期検波回路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880903A (ja) * 1981-11-09 1983-05-16 Matsushita Electric Ind Co Ltd テレビジヨン信号処理装置
JPS5896406A (ja) * 1981-12-03 1983-06-08 Matsushita Electric Ind Co Ltd バイアス回路
JPS5896404A (ja) * 1981-12-04 1983-06-08 Hitachi Ltd 同期検波回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344280A (ja) * 1989-07-12 1991-02-26 Mitsubishi Electric Corp 映像中間周波信号処理回路

Also Published As

Publication number Publication date
JPH0756544Y2 (ja) 1995-12-25

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