JPS62159085U - - Google Patents
Info
- Publication number
- JPS62159085U JPS62159085U JP4819586U JP4819586U JPS62159085U JP S62159085 U JPS62159085 U JP S62159085U JP 4819586 U JP4819586 U JP 4819586U JP 4819586 U JP4819586 U JP 4819586U JP S62159085 U JPS62159085 U JP S62159085U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- television receiver
- color television
- comb filter
- filter circuit
- 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
- 239000002131 composite material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Processing Of Color Television Signals (AREA)
- Details Of Television Scanning (AREA)
Description
第１図は本考案の一実施例を示すカラーテレビ
ジヨン受像機のノイズ低減に係わる回路部分の回
路図、第２図１はカラーテレビジヨン受像機の検
波回路で検波された複合映像信号の波形図、第２
図２は無信号時、コントラストボリユームを最大
とした時の映像利得増幅器の出力波形図、第２図
３は無信号時、コントラストボリユームを最小と
した時の映像利得増幅器の出力波形図、第２図４
は正規のブランキングパルスの波形図、第２図５
はノイズ成分の波形図である。
図中、２…クシ型フイルタ回路、４…トランジ
スタ、５…減圧抵抗、７…ダイオード、１０…ク
ランプパルス成形回路。
Fig. 1 is a circuit diagram of a circuit portion related to noise reduction in a color television receiver showing an embodiment of the present invention, and Fig. 2 1 is a waveform of a composite video signal detected by the detection circuit of the color television receiver. Figure, 2nd
Figure 2 is an output waveform diagram of the video gain amplifier when there is no signal and the contrast volume is set to the maximum. Figure 2 is an output waveform diagram of the video gain amplifier when there is no signal and the contrast volume is set to the minimum. Figure 4
is the waveform diagram of the regular blanking pulse, Fig. 2.5
is a waveform diagram of a noise component. In the figure, 2... comb filter circuit, 4... transistor, 5... pressure reducing resistor, 7... diode, 10... clamp pulse shaping circuit.
Claims (1)
るクシ型フイルタ回路を有するカラーテレビジヨ
ン受像機において、上記クシ型フイルタ回路の入
力部の電圧を、上記複合映像信号の帰線期間中ブ
ランキングレベルにクランプするクランプ手段を
設けたことを特徴とする、カラーテレビジヨン受
像機のノイズ低減回路。 In a color television receiver having a comb filter circuit for separating a composite video signal into a video signal and a chroma signal, the voltage at the input section of the comb filter circuit is set to a blanking level during the retrace period of the composite video signal. A noise reduction circuit for a color television receiver, characterized in that a clamping means is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4819586U JPS62159085U (en) | 1986-03-31 | 1986-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4819586U JPS62159085U (en) | 1986-03-31 | 1986-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62159085U true JPS62159085U (en) | 1987-10-08 |
Family
ID=30869497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4819586U Pending JPS62159085U (en) | 1986-03-31 | 1986-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62159085U (en) |
-
1986
- 1986-03-31 JP JP4819586U patent/JPS62159085U/ja active Pending