JPH0344986U - - Google Patents
Info
- Publication number
- JPH0344986U JPH0344986U JP10515189U JP10515189U JPH0344986U JP H0344986 U JPH0344986 U JP H0344986U JP 10515189 U JP10515189 U JP 10515189U JP 10515189 U JP10515189 U JP 10515189U JP H0344986 U JPH0344986 U JP H0344986U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- burst
- level detection
- detection circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案のレベル検出回路のブロツク構
成図、第２図は従来回路のブロツク構成図、第３
図，は夫々従来及び本考案のレベル検出回路
において、弱電界時に高域のノイズ成分がバース
ト信号に重畳される様子を示す波形図である。
２……同期信号分離回路、３……バーストゲー
トパルス生成回路、４……バーストレベル検出回
路、５……制御出力回路、６……帯域波器、１
０……バースト信号レベル検出回路。
Figure 1 is a block diagram of the level detection circuit of the present invention, Figure 2 is a block diagram of the conventional circuit, and Figure 3 is a block diagram of the level detection circuit of the present invention.
1 and 2 are waveform diagrams showing how high-frequency noise components are superimposed on a burst signal in a weak electric field in the conventional level detection circuit and the level detection circuit of the present invention, respectively. 2... Synchronization signal separation circuit, 3... Burst gate pulse generation circuit, 4... Burst level detection circuit, 5... Control output circuit, 6... Bandwidth wave generator, 1
0...Burst signal level detection circuit.
Claims (1)
分離する同期信号分離回路と、該同期分離された
信号からバーストゲートパルス信号を生成するバ
ーストゲートパルス生成回路と、上記入力された
コンポジツトビデオ信号に含まれるバースト信号
の大きさを検出するバーストレベル検出回路と、
該検出されたバースト信号の大きさに比例した制
御信号を出力する制御出力回路と、上記コンポジ
ツトビデオ信号のうち色副搬送波成分のみを通過
させて上記バーストレベル検出回路に印加する帯
域波器とを備えて構成したことを特徴とするバ
ースト信号レベル検出回路。 A sync signal separation circuit inputs a composite video signal and separates a sync signal; a burst gate pulse generation circuit generates a burst gate pulse signal from the sync separated signal; a burst level detection circuit that detects the magnitude of the included burst signal;
a control output circuit that outputs a control signal proportional to the magnitude of the detected burst signal; and a bandpass filter that passes only a color subcarrier component of the composite video signal and applies it to the burst level detection circuit. A burst signal level detection circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10515189U JPH0344986U (en) | 1989-09-07 | 1989-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10515189U JPH0344986U (en) | 1989-09-07 | 1989-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344986U true JPH0344986U (en) | 1991-04-25 |
Family
ID=31653921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10515189U Pending JPH0344986U (en) | 1989-09-07 | 1989-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344986U (en) |
-
1989
- 1989-09-07 JP JP10515189U patent/JPH0344986U/ja active Pending