JPS5850573U - color demodulation circuit - Google Patents
color demodulation circuitInfo
- Publication number
- JPS5850573U JPS5850573U JP14511481U JP14511481U JPS5850573U JP S5850573 U JPS5850573 U JP S5850573U JP 14511481 U JP14511481 U JP 14511481U JP 14511481 U JP14511481 U JP 14511481U JP S5850573 U JPS5850573 U JP S5850573U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulse counter
- color difference
- counter type
- modulation 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案によるカラー復調回路の一実施例を示す回路
図である。
２・・・サウンドラップ回路、３・・・リミッタ回路、
４・・・パルスカウンタ方式ＦＭ検波器、５・・田−パ
スフィルタ、６・・・セカムスイッチ回路。The figure is a circuit diagram showing an embodiment of a color demodulation circuit according to the present invention. 2...Sound wrap circuit, 3...Limiter circuit,
4... Pulse counter type FM detector, 5... Field-pass filter, 6... SECUM switch circuit.
Claims (1)
ジョン信号を入力として色差信号成分を示すＦＭ変調信
号を取り出すサウンドトラップ回路と、前記サウンドラ
ップ回路から取り出されるＦＭ変調信号が入力され、こ
のＦＭ変調信号の周波数に応じたＦＭ検波出力を取り出
すパルスカウンタ方式ＦＭ検波回路と、前記パルスカウ
ンタ方式ＦＭ検波回路のＦＭ検波出力をローパスフィル
タを介して入力するとともに、水平走査に同期して前記
色差信号成分の一方を遅延し、他方を直接選択すること
により時間合せを行なって線間時方式により色差信号を
分離して出力するセカムスイッチ回路とを備えたカラー
復調回路。A sound trap circuit receives a SECAM color television signal sent by a line sequential method and extracts an FM modulation signal representing a color difference signal component, and an FM modulation signal taken out from the sound wrap circuit is input, and the FM modulation signal is A pulse counter type FM detection circuit extracts an FM detection output according to the frequency of the pulse counter type FM detection circuit, and the FM detection output of the pulse counter type FM detection circuit is inputted via a low-pass filter, and the color difference signal component is detected in synchronization with horizontal scanning. A color demodulation circuit comprising a second switch circuit that performs time alignment by delaying one and directly selecting the other, and separates and outputs color difference signals using a line-to-line time method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14511481U JPS5850573U (en) | 1981-09-30 | 1981-09-30 | color demodulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14511481U JPS5850573U (en) | 1981-09-30 | 1981-09-30 | color demodulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5850573U true JPS5850573U (en) | 1983-04-05 |
Family
ID=29938056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14511481U Pending JPS5850573U (en) | 1981-09-30 | 1981-09-30 | color demodulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5850573U (en) |
-
1981
- 1981-09-30 JP JP14511481U patent/JPS5850573U/en active Pending
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