JPH0186776U - - Google Patents
Info
- Publication number
- JPH0186776U JPH0186776U JP18241087U JP18241087U JPH0186776U JP H0186776 U JPH0186776 U JP H0186776U JP 18241087 U JP18241087 U JP 18241087U JP 18241087 U JP18241087 U JP 18241087U JP H0186776 U JPH0186776 U JP H0186776U
- Authority
- JP
- Japan
- Prior art keywords
- video
- audio
- intermediate frequency
- carrier
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は、本考案の実施例を示すブロツク回路
図、第２図は、従来回路の例を示すブロツク回路
図である。
主要部分の符号の説明、２……フロントエンド
、７……ビデオ検波器、１１……音声用ＳＡＷフ
イルタ、１３……ＳＩＦ検波器、２１……積分回
路、２２……レベル調整器、２３……位相変調器
。
FIG. 1 is a block circuit diagram showing an embodiment of the present invention, and FIG. 2 is a block circuit diagram showing an example of a conventional circuit. Explanation of symbols of main parts, 2...Front end, 7...Video detector, 11...Audio SAW filter, 13...SIF detector, 21...Integrator circuit, 22...Level adjuster, 23... ...phase modulator.
Claims (1)
む中間周波信号から分離された分離ビデオキヤリ
アをＡＭ検波してビデオ信号を得るビデオ検波器
を含むビデオ復調系と、前記ビデオキヤリアと前
記ＦＭ音声キヤリアとのビート成分をＡＭ検波し
て音声中間周波信号を得る音声中間周波検波器を
含む音声復調系とを備えるテレビチユーナであつ
て、 前記ビデオ信号の低域成分に応じて前記音声中
間周波信号の位相を制御する位相制御手段を備え
たことを特徴とするテレビチユーナ。 (2) 前記位相制御手段は、前記ビデオ信号の低
域成分を分離するフイルタと、該分離低域成分の
レベルを調整するレベル調整手段と、前記レベル
調整手段の出力に応じて前記音声中間周波信号の
位相を制御する位相変調器とからなることを特徴
とする実用新案登録請求の範囲第１項記載のテレ
ビチユーナ。[Claims for Utility Model Registration] (1) A video demodulation system including a video detector that performs AM detection on a separated video carrier separated from an intermediate frequency signal including a video carrier and an FM audio carrier to obtain a video signal; A television tuner comprising an audio demodulation system including an audio intermediate frequency detector that performs AM detection on beat components of a video carrier and the FM audio carrier to obtain an audio intermediate frequency signal, the television tuner comprising: A television tuner comprising a phase control means for controlling the phase of the audio intermediate frequency signal. (2) The phase control means includes a filter that separates a low frequency component of the video signal, a level adjustment device that adjusts the level of the separated low frequency component, and a filter that adjusts the audio intermediate frequency according to the output of the level adjustment device. The television tuner according to claim 1, characterized in that it comprises a phase modulator for controlling the phase of a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18241087U JPH0186776U (en) | 1987-11-30 | 1987-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18241087U JPH0186776U (en) | 1987-11-30 | 1987-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0186776U true JPH0186776U (en) | 1989-06-08 |
Family
ID=31473858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18241087U Pending JPH0186776U (en) | 1987-11-30 | 1987-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0186776U (en) |
-
1987
- 1987-11-30 JP JP18241087U patent/JPH0186776U/ja active Pending
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