JPS62100769U - - Google Patents
Info
- Publication number
- JPS62100769U JPS62100769U JP19095485U JP19095485U JPS62100769U JP S62100769 U JPS62100769 U JP S62100769U JP 19095485 U JP19095485 U JP 19095485U JP 19095485 U JP19095485 U JP 19095485U JP S62100769 U JPS62100769 U JP S62100769U
- Authority
- JP
- Japan
- Prior art keywords
- muting
- signal
- detection circuit
- circuit
- signal level
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 1
Description
第１図は本考案の一実施例によるミユーテイン
グ信号検出回路のブロツク図、第２図は一例より
なるコンパレータの回路図、第３図はロツク検出
信号を得るためのＰＬＬ同期検波回路のブロツク
図、および第４図は従来例よりなるミユーテイン
グ信号検出回路のブロツク図である。
１…水平同期信号アンプ、２…平滑回路、３…
ミユーテイングスイツチ、４…コンパレータ。
FIG. 1 is a block diagram of a muting signal detection circuit according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a comparator according to an example, and FIG. 3 is a block diagram of a PLL synchronous detection circuit for obtaining a lock detection signal. FIG. 4 is a block diagram of a conventional muting signal detection circuit. 1...Horizontal synchronization signal amplifier, 2...Smoothing circuit, 3...
Muting switch, 4... comparator.
Claims (1)
ールする信号を得るミユーテイング信号検出回路
において、ミユーテイングスイツチの前段に、復
調されたビデオ信号の水平同期信号レベルとＰＬ
Ｌ同期検波回路のロツク検出信号レベルを比歓す
るコンパレータを設けたことを特徴とするミユー
テイング信号検出回路。 In a muting signal detection circuit that obtains a signal to control the muting circuit of a television receiver, the horizontal synchronizing signal level and PL of the demodulated video signal are detected before the muting switch.
A muting signal detection circuit comprising a comparator for comparing the lock detection signal level of an L synchronous detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19095485U JPS62100769U (en) | 1985-12-13 | 1985-12-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19095485U JPS62100769U (en) | 1985-12-13 | 1985-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62100769U true JPS62100769U (en) | 1987-06-26 |
Family
ID=31144649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19095485U Pending JPS62100769U (en) | 1985-12-13 | 1985-12-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62100769U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4990038A (en) * | 1972-12-27 | 1974-08-28 | ||
| JPS5119623B2 (en) * | 1972-03-15 | 1976-06-18 | ||
| JPS5410621A (en) * | 1977-06-27 | 1979-01-26 | Hitachi Ltd | Detection circuit for normal tuning frequency |
| JPS5446416A (en) * | 1977-09-19 | 1979-04-12 | Sharp Corp | Search start-stop circuit of automatic channel selector |
-
1985
- 1985-12-13 JP JP19095485U patent/JPS62100769U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5119623B2 (en) * | 1972-03-15 | 1976-06-18 | ||
| JPS4990038A (en) * | 1972-12-27 | 1974-08-28 | ||
| JPS5410621A (en) * | 1977-06-27 | 1979-01-26 | Hitachi Ltd | Detection circuit for normal tuning frequency |
| JPS5446416A (en) * | 1977-09-19 | 1979-04-12 | Sharp Corp | Search start-stop circuit of automatic channel selector |
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