JPS6289874U - - Google Patents
Info
- Publication number
- JPS6289874U JPS6289874U JP18186285U JP18186285U JPS6289874U JP S6289874 U JPS6289874 U JP S6289874U JP 18186285 U JP18186285 U JP 18186285U JP 18186285 U JP18186285 U JP 18186285U JP S6289874 U JPS6289874 U JP S6289874U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- video
- control input
- amplification circuit
- frequency amplification
- 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 2
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 230000010355 oscillation Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 1
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は従来例を示すブロツク図である。
主要部分の符号の説明、１……フロントエンド
、３……中間周波増幅器、４……映像検波器、５
……ＡＦＴ電圧発生回路、９……ＰＬＬ回路、１
１……位相変調成分検出回路、１２……合成回路
。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a conventional example. Explanation of symbols of main parts, 1...Front end, 3...Intermediate frequency amplifier, 4...Video detector, 5
...AFT voltage generation circuit, 9 ...PLL circuit, 1
1... Phase modulation component detection circuit, 12... Synthesizing circuit.
Claims (1)
像中間周波増幅回路であつて、フロントエンドか
ら出力される中間周波信号中から映像搬送波に含
まれる映像信号の位相変調成分を検出する手段と
、前記位相変調成分を前記フロンドエンドにおけ
る局部発振回路の制御入力に重畳する手段とを備
えたことを特徴とする映像中間周波増幅回路。 A video intermediate frequency amplification circuit in a TV tuner using a PLL synchronous detection method, which comprises: means for detecting a phase modulation component of a video signal included in a video carrier wave from an intermediate frequency signal output from a front end; A video intermediate frequency amplification circuit comprising: means for superimposing a control input on a control input of a local oscillation circuit in the front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18186285U JPS6289874U (en) | 1985-11-26 | 1985-11-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18186285U JPS6289874U (en) | 1985-11-26 | 1985-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6289874U true JPS6289874U (en) | 1987-06-09 |
Family
ID=31127125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18186285U Pending JPS6289874U (en) | 1985-11-26 | 1985-11-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289874U (en) |
-
1985
- 1985-11-26 JP JP18186285U patent/JPS6289874U/ja active Pending
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