JPS63144782U - - Google Patents
Info
- Publication number
- JPS63144782U JPS63144782U JP3705387U JP3705387U JPS63144782U JP S63144782 U JPS63144782 U JP S63144782U JP 3705387 U JP3705387 U JP 3705387U JP 3705387 U JP3705387 U JP 3705387U JP S63144782 U JPS63144782 U JP S63144782U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- acc
- predetermined value
- output
- peak
- 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 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は、本考案による色復調回路の一実施例
を示すブロツク図、第２図は、従来のＰＡＬ方式
色復調回路を示すブロツク図である。
２……クロマバンドパスフイルター、３……Ａ
ＣＣ回路、４……１Ｈ遅延回路、５……クロマ復
調回路、６……復調バースト信号レベル検出回路
、８……ピーククリツプ検出回路、９……コンデ
ンサ、１４……抵抗、１５……抵抗。
FIG. 1 is a block diagram showing an embodiment of a color demodulation circuit according to the present invention, and FIG. 2 is a block diagram showing a conventional PAL color demodulation circuit. 2...Chroma band pass filter, 3...A
CC circuit, 4... 1H delay circuit, 5... chroma demodulation circuit, 6... demodulated burst signal level detection circuit, 8... peak clip detection circuit, 9... capacitor, 14... resistor, 15... resistor.
Claims (1)
ｕｔｏ Ｃｏｌｏｕｒ Ｃｏｎｔｒｏｌ）回路と
、該ＡＣＣ回路の出力ピークレベルが所定値を越
えたか否かを前記ＡＣＣ回路の出力の交流成分か
ら検出するピーククリツプ検出回路とを有し、前
記ＡＣＣ回路のピークレベルが所定値を越えた時
には、前記ＡＣＣ回路のゲインを減少させるよう
にしたことを特徴とする色復調回路。 ACC (A) is used to keep the color signal level at a constant value.
and a peak clip detection circuit for detecting whether the output peak level of the ACC circuit exceeds a predetermined value from the alternating current component of the output of the ACC circuit. A color demodulation circuit characterized in that the gain of the ACC circuit is reduced when a predetermined value is exceeded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3705387U JPS63144782U (en) | 1987-03-13 | 1987-03-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3705387U JPS63144782U (en) | 1987-03-13 | 1987-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63144782U true JPS63144782U (en) | 1988-09-22 |
Family
ID=30848029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3705387U Pending JPS63144782U (en) | 1987-03-13 | 1987-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63144782U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6243992A (en) * | 1985-08-22 | 1987-02-25 | Sony Corp | Color demodulating circuit for pal system color television signal |
-
1987
- 1987-03-13 JP JP3705387U patent/JPS63144782U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6243992A (en) * | 1985-08-22 | 1987-02-25 | Sony Corp | Color demodulating circuit for pal system color television signal |
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