JPS5868764U - RF modulator - Google Patents
RF modulatorInfo
- Publication number
- JPS5868764U JPS5868764U JP16292581U JP16292581U JPS5868764U JP S5868764 U JPS5868764 U JP S5868764U JP 16292581 U JP16292581 U JP 16292581U JP 16292581 U JP16292581 U JP 16292581U JP S5868764 U JPS5868764 U JP S5868764U
- Authority
- JP
- Japan
- Prior art keywords
- carrier wave
- modulator
- trap circuit
- output
- signal source
- 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
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図は本考案の1実施例の回路構成図、第2図a−d
は第1図中d各部の出力信号波形図、第3図は周波数変
換器出力からトラップ回路出力ま ゛での周波
数応答特性図である。
主な図番の説明、1・・・ビデオ信号源、2・・・オー
ディオ信号源、′8・・・搬送波発生源、11・・・変
調器、13・・・第2変調器、15・・・変換器、19
・・・トラップ回路、27・・・インダクタンス素子。
wJ浪散(MH3り
周11敗(M)lz)Fig. 1 is a circuit diagram of one embodiment of the present invention, Fig. 2 a-d
1 is an output signal waveform diagram of each part d in FIG. 1, and FIG. 3 is a frequency response characteristic diagram from the frequency converter output to the trap circuit output. Explanation of main figure numbers, 1... Video signal source, 2... Audio signal source, '8... Carrier wave generation source, 11... Modulator, 13... Second modulator, 15... ...Converter, 19
...Trap circuit, 27...Inductance element. wJ Wazan (MH3 rip 11 losses (M)lz)
Claims (1)
送波を択一的に出力する搬送波発生源と、該搬送波発生
源からの第1又は第2搬送波を前記ビデオ信号源からの
ビデオ信号で変調する変調器と、前記オーディオ信号源
からのオーディオ信号を周波数変調する第2変調器と、
該第2変調器出力を前記搬送波発生源からの第1又は第
2搬送波で周波数変換する変換器と、該変換器出力のう
ち一前記第1搬送波に対する第1下側波帯及び前記第2
搬送波に対する第2下側波帯を除去するため互に縦続接
続された第1、第2トラップ回路よりなるトラップ回路
と、前記変調器出力と該トラップ回路出力を混合する回
路とを備えてなるRF変調回路において、前記変換器出
力と前記トラップ回路入力との間に、該トラップ回路を
通過する前記鯖1搬送波に対する第1上側波帯及び前記
第2搬送波に対する第2上側波帯のレベル差を小さくす
るために、インダクタンス素子を接続してなるRF変調
器。a video signal source, an audio signal source, a carrier wave generation source that selectively outputs a first or a second carrier wave, and a first or second carrier wave from the carrier wave generation source as a video signal from the video signal source. a second modulator for frequency modulating the audio signal from the audio signal source;
a converter for converting the frequency of the second modulator output with a first or second carrier wave from the carrier wave generation source; a first lower sideband for one of the converter outputs and a first lower sideband for the first carrier wave;
an RF trap circuit comprising a first and second trap circuit connected in cascade to remove a second lower sideband with respect to a carrier wave; and a circuit for mixing the modulator output and the trap circuit output. In the modulation circuit, between the converter output and the trap circuit input, a level difference between a first upper sideband for the first carrier wave and a second upper sideband for the second carrier wave passing through the trap circuit is reduced. An RF modulator that connects an inductance element to achieve this.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16292581U JPS5868764U (en) | 1981-10-30 | 1981-10-30 | RF modulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16292581U JPS5868764U (en) | 1981-10-30 | 1981-10-30 | RF modulator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5868764U true JPS5868764U (en) | 1983-05-10 |
JPS6133746Y2 JPS6133746Y2 (en) | 1986-10-02 |
Family
ID=29955231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16292581U Granted JPS5868764U (en) | 1981-10-30 | 1981-10-30 | RF modulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5868764U (en) |
-
1981
- 1981-10-30 JP JP16292581U patent/JPS5868764U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6133746Y2 (en) | 1986-10-02 |
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