JPS62117884U - - Google Patents
Info
- Publication number
- JPS62117884U JPS62117884U JP387886U JP387886U JPS62117884U JP S62117884 U JPS62117884 U JP S62117884U JP 387886 U JP387886 U JP 387886U JP 387886 U JP387886 U JP 387886U JP S62117884 U JPS62117884 U JP S62117884U
- Authority
- JP
- Japan
- Prior art keywords
- audio
- modulator
- modulation
- signal
- output
- 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
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 101000959126 Xenopus laevis Peptidyl-alpha-hydroxyglycine alpha-amidating lyase B Proteins 0.000 description 1
Description
第１図はこの考案のＲＦコンバータの実施例を
示すブロツク系統図、第２図はこの考案の主ＡＭ
変調器の一例を示す回路図、第３図は第２図の主
ＡＭ変調器に使用されるダイオードの電圧―電流
特性を示す図、第４図は従来のＰＡＬ―Ｂ／Ｇ方
式及びＮＴＳＣ方式のＲＦコンバータのブロツク
系統図、第５図はビデオ信号波形と搬送波をビデ
オ信号でＡＭ変調した変調波形とを示す波形図、
第６図は従来のＳＥＣＡＭ―Ｌ方式のＲＦコンバ
ータのブロツク系統図である。
１：音声入力端子、２：音声増幅器、３ａ：音
声用ＦＭ変調器、３ｂ：音声用ＡＭ変調器、４ａ
，４ｂ，４ｃ：音声用搬送波発振器、５ａ，５ｂ
：帯域波器、６：重畳手段、７：ビデオ入力端
子、８：ビデオ増幅器、９ａ，９ｂ，９ｃ：主Ａ
Ｍ変調器、１０ａ，１０ｂ，１０ｃ：主搬送波発
振器、１１：出力端子、１２，１２′：選択手段
、１３：第１発振周波数切換え手段、１４：変調
切換え手段、１５：第２発振周波数切換え手段。
Figure 1 is a block system diagram showing an embodiment of the RF converter of this invention, and Figure 2 is the main AM of this invention.
A circuit diagram showing an example of a modulator, Fig. 3 is a diagram showing the voltage-current characteristics of the diode used in the main AM modulator in Fig. 2, and Fig. 4 shows the conventional PAL-B/G system and NTSC system. 5 is a waveform diagram showing the video signal waveform and the modulation waveform obtained by AM modulating the carrier wave with the video signal,
FIG. 6 is a block diagram of a conventional SECAM-L type RF converter. 1: Audio input terminal, 2: Audio amplifier, 3a: FM modulator for audio, 3b: AM modulator for audio, 4a
, 4b, 4c: Audio carrier wave oscillator, 5a, 5b
: Bandwidth wave generator, 6: Superimposing means, 7: Video input terminal, 8: Video amplifier, 9a, 9b, 9c: Main A
M modulator, 10a, 10b, 10c: main carrier oscillator, 11: output terminal, 12, 12': selection means, 13: first oscillation frequency switching means, 14: modulation switching means, 15: second oscillation frequency switching means .
Claims (1)
給される音声用ＦＭ変調器と、 上記音声増幅器の増幅出力が変調信号として供
給される音声用ＡＭ変調器と、 発振周波数を切換えることができ、出力を搬送
波信号として上記音声用ＦＭ変調器及び上記音声
用ＡＭ変調器へ供給する音声用搬送波発振器と、 上記音声用ＦＭ変調器の変調出力より所望の帯
域を選出する第１帯域波器と、 上記音声用ＡＭ変調器の変調出力より所望の帯
域を選出する第２帯域波器と、 上記音声用搬送波発振器の発振周波数を第１の
値と第２の値に切換える発振周波数切換え手段と
、 第１帯域波器及び第２帯域波器の一方の出
力を選択する選択手段と、 その選択手段により選択された出力信号と、ビ
デオ信号とを重畳する重畳手段と、 その重畳出力が変調信号として供給され、正変
調と負変調とを切換えることができる主ＡＭ変調
器と、 その主ＡＭ変調器へ主搬送波信号を供給する主
搬送波発振器と、 上記主ＡＭ変調器を正変調または負変調に切換
える変調切換え手段とより成るＲＦコンバータ。[Claims for Utility Model Registration] An audio amplifier that amplifies an audio signal, an audio FM modulator to which the amplified output of the audio amplifier is supplied as a modulation signal, and an audio FM modulator to which the amplified output of the audio amplifier is supplied as a modulation signal. an audio AM modulator; an audio carrier wave oscillator whose oscillation frequency can be switched and whose output is supplied as a carrier wave signal to the audio FM modulator and the audio AM modulator; and modulation of the audio FM modulator. a first band waver that selects a desired band from the output; a second band wave generator that selects a desired band from the modulated output of the audio AM modulator; an oscillation frequency switching means for switching between a value and a second value; a selection means for selecting one of the outputs of the first bandpass transducer and the second bandpass transducer; an output signal selected by the selection means; and a video signal. a main AM modulator whose superimposed output is supplied as a modulation signal and can switch between positive modulation and negative modulation; and a main carrier oscillator that supplies a main carrier signal to the main AM modulator. , an RF converter comprising modulation switching means for switching the main AM modulator to positive modulation or negative modulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP387886U JPS62117884U (en) | 1986-01-13 | 1986-01-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP387886U JPS62117884U (en) | 1986-01-13 | 1986-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62117884U true JPS62117884U (en) | 1987-07-27 |
Family
ID=30784041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP387886U Pending JPS62117884U (en) | 1986-01-13 | 1986-01-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62117884U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588474A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator for both pal and secam |
-
1986
- 1986-01-13 JP JP387886U patent/JPS62117884U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588474A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator for both pal and secam |
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