JPS5819573U

JPS5819573U - Television signal transmitter

Info

Publication number: JPS5819573U
Application number: JP11417581U
Authority: JP
Inventors: 西村　譲治; 高沢　滋
Original assignee: Mitsumi Electric Co Ltd
Current assignee: Mitsumi Electric Co Ltd
Priority date: 1981-07-31
Filing date: 1981-07-31
Publication date: 1983-02-07

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

[Brief explanation of the drawing]

第１図は従来のテレビジョン信号送信装置の１例を示す
ブロック系統図、第２図は本考案になるテレビジョン信
号送信装置の１実施例のブロック系統図、第３図は第２
図示の回路のフィルタ回路の第１実施例の回路図、第４
図は第２図示の回路のフィルタ回路の第２実施例の回路
図である。１、　５．　１２・・・入力端子、２，６・・・増幅器
、３・・・振幅変調器、４・・・発振器、４ａ、　　４
ｂ・・・発振素子、７・・・ＦＭ変調器、８・・・周波
数変調器、９ａ。９ｂ、　　１１．　１１’・・・フィルタ回路、１０，
１５ｙ出力端子、１４．ＳＷ、〜ＳＷ３・・・端子、Ｃ
０〜Ｃ７・・・コンデンサ、Ｄ□、Ｄ２・・・ダイオー
ド、Ｌ１〜Ｌ４・・・コイル、Ｒ１−Ｒ３・・・抵抗。第４図１１′FIG. 1 is a block system diagram showing an example of a conventional television signal transmitting device, FIG. 2 is a block system diagram of an embodiment of the television signal transmitting device according to the present invention, and FIG.
Circuit diagram of the first embodiment of the filter circuit of the illustrated circuit, No. 4
The figure is a circuit diagram of a second embodiment of the filter circuit of the circuit shown in the second figure. 1, 5. 12... Input terminal, 2, 6... Amplifier, 3... Amplitude modulator, 4... Oscillator, 4a, 4
b... Oscillation element, 7... FM modulator, 8... Frequency modulator, 9a. 9b, 11. 11'...filter circuit, 10,
15y output terminal, 14. SW, ~SW3...terminal, C
0 to C7...Capacitor, D□, D2...Diode, L1 to L4...Coil, R1-R3...Resistance. Figure 4 11'

Claims

[Scope of utility model registration request]

A carrier wave oscillator that oscillates multiple carrier wave frequencies using a changeover switch, a modulator that amplitude modulates the carrier wave from the carrier wave oscillator using a video signal and outputs a modulated wave signal, and a modulator that frequency modulates a single frequency using an audio signal. a frequency modulator that outputs a frequency-modulated wave; a frequency converter that converts the frequency of the carrier wave using the frequency-modulated wave; and a frequency converter that allows only the enhanced sideband of the frequency component frequency-converted by the frequency converter to pass through. A television signal transmitter comprising a filter circuit and combining the modulated wave signal and the output signal of the filter circuit, a switching element connected in direct current to the changeover switch, and switching of the switching element. television signal transmission comprising a filter circuit whose resonant frequency can be switched by switching either an inductance element or a capacitance element, and the pass band of the filter circuit is switched in response to the switching of the changeover switch. Device.