JPS6312976U - - Google Patents

Info

Publication number
JPS6312976U
JPS6312976U JP1986093747U JP9374786U JPS6312976U JP S6312976 U JPS6312976 U JP S6312976U JP 1986093747 U JP1986093747 U JP 1986093747U JP 9374786 U JP9374786 U JP 9374786U JP S6312976 U JPS6312976 U JP S6312976U
Authority
JP
Japan
Prior art keywords
circuit
synchronization signal
vertical
signal
vertical synchronization
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
JP1986093747U
Other languages
Japanese (ja)
Other versions
JPH0510456Y2 (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 JP9374786U priority Critical patent/JPH0510456Y2/ja
Priority to KR1019870006170A priority patent/KR930005183B1/en
Priority to US07/063,949 priority patent/US4845563A/en
Priority to EP87108804A priority patent/EP0249987B1/en
Priority to DE87108804T priority patent/DE3787126T2/en
Publication of JPS6312976U publication Critical patent/JPS6312976U/ja
Application granted granted Critical
Publication of JPH0510456Y2 publication Critical patent/JPH0510456Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Synchronizing For Television (AREA)

Description

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

第１図は、本考案の一実施例を示す回路図、及
び第２図は従来の垂直駆動パルス発生回路を示す
回路図である。 ９……同期分離回路、１１……垂直カウントダ
ウン回路、１３……入力選択回路、１４……リセ
ツトパルス発生回路、１８……信号選択回路、１
９……位相比較回路、２０……微分回路、２１…
…端子、２２……１６進カウンタ、２４……８進
カウンタ、２６……ＳＲ―ＦＦ、２７……オアゲ
ート。 FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional vertical drive pulse generation circuit. 9...Synchronization separation circuit, 11...Vertical countdown circuit, 13...Input selection circuit, 14...Reset pulse generation circuit, 18...Signal selection circuit, 1
9...Phase comparison circuit, 20 ...Differentiating circuit, 21...
...terminal, 22...hexadecimal counter, 24...octal counter, 26...SR-FF, 27...OR gate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 水平同期信号のＮ倍の周波数のクロツク信号が
印加され、該クロツク信号を分周して疑似垂直同
期信号を発生する垂直カウントダウン回路と、映
像信号中の垂直同期信号を同期分離する同期分離
回路と、前記疑似垂直同期信号及び前記垂直同期
信号が印加され、どちらかを選択出力する選択回
路と、該選択回路の出力信号に応じて前記垂直カ
ウントダウン回路をリセツトさせるリセツトパル
ス発生回路と、チヤンネル切換信号に応じて前記
選択回路を切換える切換回路とから成り、前記垂
直カウントダウン回路が前記疑似垂直同期信号に
よつてリセツトされている状態で、チヤンネル切
換えが行なわれた場合、前記切換回路によつて前
記選択回路が前記垂直同期信号を選択出力する様
にさせたことを特徴とする垂直駆動パルス発生回
路。 a vertical countdown circuit to which a clock signal with a frequency N times that of the horizontal synchronization signal is applied and frequency-divides the clock signal to generate a pseudo vertical synchronization signal; and a synchronization separation circuit to synchronously separate the vertical synchronization signal in the video signal. , a selection circuit to which the pseudo vertical synchronization signal and the vertical synchronization signal are applied and selectively outputs one of them; a reset pulse generation circuit that resets the vertical countdown circuit in accordance with the output signal of the selection circuit; and a channel switching signal. a switching circuit that switches the selection circuit according to the switching circuit, and when channel switching is performed while the vertical countdown circuit has been reset by the pseudo vertical synchronization signal, the switching circuit switches the selection circuit. A vertical drive pulse generation circuit characterized in that the circuit selectively outputs the vertical synchronization signal.
JP9374786U 1986-06-19 1986-06-19 Expired - Lifetime JPH0510456Y2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP9374786U JPH0510456Y2 (en) 1986-06-19 1986-06-19
KR1019870006170A KR930005183B1 (en) 1986-06-19 1987-06-18 Vertical driving pulse generating circuit
US07/063,949 US4845563A (en) 1986-06-19 1987-06-19 Vertical driving pulse generating circuit
EP87108804A EP0249987B1 (en) 1986-06-19 1987-06-19 Vertical driving pulse generating circuit
DE87108804T DE3787126T2 (en) 1986-06-19 1987-06-19 Circuit for generating vertical driver pulses.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9374786U JPH0510456Y2 (en) 1986-06-19 1986-06-19

Publications (2)

Publication Number Publication Date
JPS6312976U true JPS6312976U (en) 1988-01-28
JPH0510456Y2 JPH0510456Y2 (en) 1993-03-15

Family

ID=30956583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9374786U Expired - Lifetime JPH0510456Y2 (en) 1986-06-19 1986-06-19

Country Status (1)

Country Link
JP (1) JPH0510456Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006060483A (en) * 2004-08-19 2006-03-02 Sharp Corp Vertical synchronizing circuit and television receiver equipped therewith

Also Published As

Publication number Publication date
JPH0510456Y2 (en) 1993-03-15

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