JPS59143166U - Detection device - Google Patents
Detection deviceInfo
- Publication number
- JPS59143166U JPS59143166U JP3661483U JP3661483U JPS59143166U JP S59143166 U JPS59143166 U JP S59143166U JP 3661483 U JP3661483 U JP 3661483U JP 3661483 U JP3661483 U JP 3661483U JP S59143166 U JPS59143166 U JP S59143166U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- frequency signal
- video
- output
- audio
- 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.)
- Granted
Links
Landscapes
- Television Receiver Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の検波装置の一例を示す回路図、第２図は
同じく他の例を示す回路図、第３図はこの考案に係る検
波装置の一実施例を示す回路図、第４図は第３図の帯域
フィルタの周波数特性を示す特性図である。
３１・・・入力端子、３２・・・帯域フィルタ、３３゜
３６．３９．４２・・・増幅回路、３４・・・リミッタ
、３５．４０・・・掛算回路、３７．３８・・・ＡＧＣ
回路、４１・・・移相回路。FIG. 1 is a circuit diagram showing an example of a conventional detection device, FIG. 2 is a circuit diagram showing another example, FIG. 3 is a circuit diagram showing an embodiment of the detection device according to this invention, and FIG. 3 is a characteristic diagram showing the frequency characteristics of the bandpass filter of FIG. 3. FIG. 31... Input terminal, 32... Bandpass filter, 33° 36.39.42... Amplifier circuit, 34... Limiter, 35.40... Multiplier circuit, 37.38... AGC
Circuit, 41...phase shift circuit.
Claims (1)
号が印加される入力端子と、前記映像中間周波信号の周
波数帯域と略同じ通過帯域と前記第１の音声中間周波信
号の周波数帯域より若干広い通過帯域との２つ通過帯域
とを有し前記混合信号を映像中間周波信号と第１の音声
中間周波信号に分離するフィルタ手段と、このフィルタ
手段の映像中間周波信号出力から映像搬送波を抽出する
映像搬送波抽出手段と、この映像搬送波抽出手段の出力
と前記フィルタ手段の映像中間周波信号出力とを掛算し
映像信号を得る第１の掛算手段と、前記搬送波抽出手段
の出力を移相する移相手段と、この移相手段の出力と前
記フィルタ手段の第１の音声中間周波信号出力とを掛算
することにより第２の音声中間周波信号を得る第２の掛
算手段とを具備した検波装置。an input terminal to which a mixed signal of a video intermediate frequency signal and a first audio intermediate frequency signal is applied, a passband substantially the same as the frequency band of the video intermediate frequency signal, and a frequency band from the first audio intermediate frequency signal; filter means having two pass bands, a slightly wider pass band and a first audio intermediate frequency signal, and separating the mixed signal into a video intermediate frequency signal and a first audio intermediate frequency signal; and a video carrier wave is extracted from the video intermediate frequency signal output of the filter means. a video carrier extraction means for extracting; a first multiplication means for multiplying the output of the video carrier extraction means by the video intermediate frequency signal output of the filter means to obtain a video signal; and a first multiplication means for phase-shifting the output of the carrier extraction means. A detection device comprising a phase shifting means and a second multiplication means for obtaining a second audio intermediate frequency signal by multiplying the output of the phase shifting means and the first audio intermediate frequency signal output of the filter means. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661483U JPS59143166U (en) | 1983-03-14 | 1983-03-14 | Detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661483U JPS59143166U (en) | 1983-03-14 | 1983-03-14 | Detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59143166U true JPS59143166U (en) | 1984-09-25 |
| JPH0113489Y2 JPH0113489Y2 (en) | 1989-04-20 |
Family
ID=30167279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3661483U Granted JPS59143166U (en) | 1983-03-14 | 1983-03-14 | Detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59143166U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514782A (en) * | 1978-07-18 | 1980-02-01 | Matsushita Electric Ind Co Ltd | Television picture receiver |
-
1983
- 1983-03-14 JP JP3661483U patent/JPS59143166U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514782A (en) * | 1978-07-18 | 1980-02-01 | Matsushita Electric Ind Co Ltd | Television picture receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0113489Y2 (en) | 1989-04-20 |
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