JPH03479U - - Google Patents
Info
- Publication number
- JPH03479U JPH03479U JP6109689U JP6109689U JPH03479U JP H03479 U JPH03479 U JP H03479U JP 6109689 U JP6109689 U JP 6109689U JP 6109689 U JP6109689 U JP 6109689U JP H03479 U JPH03479 U JP H03479U
- Authority
- JP
- Japan
- Prior art keywords
- horizontal
- circuit
- output
- supplied
- drive signal
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
Description
第１図は本考案の水平同期信号処理回路の一実
施例を示すブロツク図、第２図は第１図に示した
ブロツク図における各部の信号の波形図、第３図
は従来例を示すブロツク図である。
１……入力端子、２……位相比較回路、３……
水平発振回路、４……水平出力回路、５……判定
回路、６……切換回路、７……水平ドライブ信号
補間回路、８……受像管（ＣＲＴ）、９……反転
増幅器、Ｃ１〜Ｃ３……コンデンサ、Ｒ１〜Ｒ４
……抵抗。
Fig. 1 is a block diagram showing one embodiment of the horizontal synchronization signal processing circuit of the present invention, Fig. 2 is a waveform diagram of signals at various parts in the block diagram shown in Fig. 1, and Fig. 3 is a block diagram showing a conventional example. It is a diagram. 1...Input terminal, 2...Phase comparison circuit, 3...
Horizontal oscillation circuit, 4... Horizontal output circuit, 5... Judgment circuit, 6... Switching circuit, 7... Horizontal drive signal interpolation circuit, 8... Picture tube (CRT), 9... Inverting amplifier, C 1 ~ C3 ...Capacitor, R1 to R4
……resistance.
Claims (1)
る水平出力回路と、 供給される複合映像信号または水平同期信号と
この水平出力回路の出力とを位相比較する位相比
較回路と、 この位相比較回路の出力信号が供給され、前記
水平ドライブ信号を出力する水平発振回路とを有
する水平同期信号処理回路において、 前記水平発振回路より供給される水平ドライブ
信号を検出する判定回路と、 前記水平発振回路の出力が一方の入力端子に供
給され、この判定回路の出力により入力端子が切
換えられて前記水平出力回路に出力する切換回路
と、 この切換回路の出力の一部が供給され、前記水
平発振回路の出力に位相同期した水平ドライブ信
号を前記切換回路の他方の入力端子に出力する水
平ドライブ信号補間回路とよりなり、 前記水平発振回路より出力される水平ドライブ
信号の異常時には前記水平ドライブ信号補間回路
の出力が前記水平出力回路に供給され、他の時は
前記水平発振回路の出力が供給されるようにした
ことを特徴とする水平同期信号処理回路。[Claims for Utility Model Registration] A horizontal output circuit that is supplied with a horizontal drive signal and outputs a horizontal signal, and a phase comparison circuit that compares the phase of the supplied composite video signal or horizontal synchronization signal with the output of this horizontal output circuit. , a horizontal synchronization signal processing circuit that is supplied with the output signal of the phase comparison circuit and has a horizontal oscillation circuit that outputs the horizontal drive signal, a determination circuit that detects the horizontal drive signal supplied from the horizontal oscillation circuit; a switching circuit in which the output of the horizontal oscillation circuit is supplied to one input terminal, and the input terminal is switched according to the output of the determination circuit and output to the horizontal output circuit; a part of the output of the switching circuit is supplied; A horizontal drive signal interpolation circuit outputs a horizontal drive signal phase-synchronized with the output of the horizontal oscillation circuit to the other input terminal of the switching circuit, and when the horizontal drive signal output from the horizontal oscillation circuit is abnormal, the horizontal A horizontal synchronization signal processing circuit, characterized in that the output of the drive signal interpolation circuit is supplied to the horizontal output circuit, and the output of the horizontal oscillation circuit is supplied at other times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6109689U JPH03479U (en) | 1989-05-26 | 1989-05-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6109689U JPH03479U (en) | 1989-05-26 | 1989-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03479U true JPH03479U (en) | 1991-01-07 |
Family
ID=31589043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6109689U Pending JPH03479U (en) | 1989-05-26 | 1989-05-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03479U (en) |
-
1989
- 1989-05-26 JP JP6109689U patent/JPH03479U/ja active Pending
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