JPS637866U - - Google Patents
Info
- Publication number
- JPS637866U JPS637866U JP10251486U JP10251486U JPS637866U JP S637866 U JPS637866 U JP S637866U JP 10251486 U JP10251486 U JP 10251486U JP 10251486 U JP10251486 U JP 10251486U JP S637866 U JPS637866 U JP S637866U
- Authority
- JP
- Japan
- Prior art keywords
- video
- intermediate frequency
- signal
- audio
- frequency amplifier
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図はこの考案の映像中間周波増幅回路の一
実施例のブロツク図、第２図は同上映像中間周波
増幅回路の中間周波特性図、第３図は従来の映像
中間周波増幅回路のブロツク図、第４図は第３図
の映像中間周波増幅回路の中間周波特性図である
。
１……高周波増幅器、２……周波数変換器、３
……映像中間周波増幅器、４……映像検波器、５
……４．５ＭＨｚ検波器、６……音声中間周波増
幅器、７……ＦＭ検波器、８……直流変換回路。
なお、図中同一符号は同一または相当部分を示す
。
Figure 1 is a block diagram of one embodiment of the video intermediate frequency amplification circuit of this invention, Figure 2 is an intermediate frequency characteristic diagram of the same video intermediate frequency amplification circuit, and Figure 3 is a block diagram of a conventional video intermediate frequency amplification circuit. , FIG. 4 is an intermediate frequency characteristic diagram of the video intermediate frequency amplification circuit of FIG. 3. 1...High frequency amplifier, 2...Frequency converter, 3
...Video intermediate frequency amplifier, 4...Video detector, 5
...4.5MHz detector, 6...Audio intermediate frequency amplifier, 7...FM detector, 8...DC conversion circuit.
Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
信号を検波して映像信号を得る映像検波器、上記
映像中間周波信号から音声中間周波信号を抽出し
て音声信号を得る手段、上記映像検波器で検波さ
れた映像信号を直流信号に変換してそれを上記映
像中間周波増幅器に帰還させて中間周波信号の音
声キヤリアのレベルを可変させる直流変換回路を
備えてなる映像中間周波増幅回路。 A video detector for detecting a video intermediate frequency signal amplified by a video intermediate frequency amplifier to obtain a video signal; means for extracting an audio intermediate frequency signal from the video intermediate frequency signal to obtain an audio signal; and detection by the video detector. A video intermediate frequency amplifier circuit comprising a DC conversion circuit that converts the video signal into a DC signal and feeds it back to the video intermediate frequency amplifier to vary the level of an audio carrier of the intermediate frequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10251486U JPS637866U (en) | 1986-07-01 | 1986-07-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10251486U JPS637866U (en) | 1986-07-01 | 1986-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS637866U true JPS637866U (en) | 1988-01-19 |
Family
ID=30974230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10251486U Pending JPS637866U (en) | 1986-07-01 | 1986-07-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS637866U (en) |
-
1986
- 1986-07-01 JP JP10251486U patent/JPS637866U/ja active Pending