JPH0268573U - - Google Patents
Info
- Publication number
- JPH0268573U JPH0268573U JP1988146657U JP14665788U JPH0268573U JP H0268573 U JPH0268573 U JP H0268573U JP 1988146657 U JP1988146657 U JP 1988146657U JP 14665788 U JP14665788 U JP 14665788U JP H0268573 U JPH0268573 U JP H0268573U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- tuning
- timing pulse
- video intermediate
- video
- 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 6
- 230000003321 amplification Effects 0.000 claims 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Description
第１図は本考案の一実施例によるテレビ受像機
の主要部の回路構成を示すブロツク図、第２図は
同実施例の動作を説明するためのタイミングチヤ
ート、第３図は同実施例における音声信号の再生
動作を説明するための図、第４図は従来のセパレ
ートキヤリア方式を用いたテレビ受像機の主要部
の構成を示すブロツク図である。
２０……アンテナ、２１……チユーナ、２２…
…フイルタ、２３……映像ＩＦ／ＤＥＴ回路、２
４……同期分離回路、２５……スイツチング回路
、２６……遅延回路、２７……積分回路。
FIG. 1 is a block diagram showing the circuit configuration of the main parts of a television receiver according to an embodiment of the present invention, FIG. 2 is a timing chart for explaining the operation of the embodiment, and FIG. FIG. 4, which is a diagram for explaining the reproduction operation of an audio signal, is a block diagram showing the configuration of the main part of a television receiver using a conventional separate carrier system. 20...Antenna, 21...Chyuna, 22...
...Filter, 23...Video IF/DET circuit, 2
4...Synchronization separation circuit, 25...Switching circuit, 26...Delay circuit, 27...Integrator circuit.
Claims (1)
う映像中間周波増幅／検波回路と、この映像中間
周波増幅／検波回路から出力される映像信号中の
水平同期信号のバツクポーチ部分に対応するタイ
ミングパルスを作成するタイミングパルス作成手
段と、この手段により作成したタイミングパルス
に基づいて上記映像中間周波増幅／検波回路の検
波段の同調周波数を水平同期信号のバツクポーチ
部分においてのみ音声中間周波信号に同調させ、
それ以外では映像中間周波信号に同調させる同調
周波数切換手段と、上記映像中間周波増幅／検波
回路から出力される音声検波信号を上記タイミン
グパルスに同期して取出すスイツチイング回路と
を具備したことを特徴とする中間周波数回路。 A video intermediate frequency amplification/detection circuit that amplifies and detects a television video intermediate frequency signal, and a timing pulse corresponding to the back porch portion of the horizontal synchronization signal in the video signal output from the video intermediate frequency amplification/detection circuit. a timing pulse generating means, and tuning the tuning frequency of the detection stage of the video intermediate frequency amplification/detection circuit to the audio intermediate frequency signal only in the back porch portion of the horizontal synchronization signal based on the timing pulse generated by the means;
Other features include a tuning frequency switching means for tuning to the video intermediate frequency signal, and a switching circuit for extracting the audio detection signal output from the video intermediate frequency amplification/detection circuit in synchronization with the timing pulse. intermediate frequency circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988146657U JPH0268573U (en) | 1988-11-11 | 1988-11-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988146657U JPH0268573U (en) | 1988-11-11 | 1988-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0268573U true JPH0268573U (en) | 1990-05-24 |
Family
ID=31416352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988146657U Pending JPH0268573U (en) | 1988-11-11 | 1988-11-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268573U (en) |
-
1988
- 1988-11-11 JP JP1988146657U patent/JPH0268573U/ja active Pending
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