JPH0419879U - - Google Patents

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Publication number
JPH0419879U
JPH0419879U JP1990057818U JP5781890U JPH0419879U JP H0419879 U JPH0419879 U JP H0419879U JP 1990057818 U JP1990057818 U JP 1990057818U JP 5781890 U JP5781890 U JP 5781890U JP H0419879 U JPH0419879 U JP H0419879U
Authority
JP
Japan
Prior art keywords
video
amplifier
circuit
output terminal
agc
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
Application number
JP1990057818U
Other languages
Japanese (ja)
Other versions
JPH071891Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1990057818U priority Critical patent/JPH071891Y2/en
Publication of JPH0419879U publication Critical patent/JPH0419879U/ja
Application granted granted Critical
Publication of JPH071891Y2 publication Critical patent/JPH071891Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Details Of Television Systems (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例の回路図、第２図は
本考案のアンプ出力電圧特性図、第３図は本考案
のＩＦゲイン特性図、第４図は本考案の他の実施
例の要部の構成図及びそのアンプ出力電圧特性図
、第５図は一般のＣＡＴＶシステムの概略図、第
６図は従来の一例の回路図、第７図は従来のアン
プ出力電圧特性図である。 １……ＣＡＴＶ選局部、２……増幅及び復調部
、３……変調部、１０１〜１０３……ＩＦアンプ
、１１……ビデオ検波器、１２……リミツタアン
プ、１３……ビデオアンプ、１４１〜１４３……
ＡＧＣアンプ、２０，２０１，２０２……ツエナ
ーダイオード。 Figure 1 is a circuit diagram of one embodiment of the present invention, Figure 2 is an amplifier output voltage characteristic diagram of the present invention, Figure 3 is an IF gain characteristic diagram of the present invention, and Figure 4 is another embodiment of the present invention. Figure 5 is a schematic diagram of a general CATV system, Figure 6 is a circuit diagram of a conventional example, and Figure 7 is a diagram of conventional amplifier output voltage characteristics. . DESCRIPTION OF SYMBOLS 1...CATV channel selection section, 2...Amplification and demodulation section, 3...Modulation section, 10 1 to 10 3 ...IF amplifier, 11...Video detector, 12...Limiter amplifier, 13...Video amplifier, 14 1 ~14 3 ...
AGC amplifier, 20, 20 1 , 20 2 ... Zener diode.

Claims (1)

【実用新案登録請求の範囲】 ＩＦ入力信号をＩＦアンプで増幅し、かつ、こ
れを検波して得た映像信号にＡＧＣをかけて該Ｉ
Ｆアンプ及びＩＦ入力側に帰還させる構成の映像
ＩＦ回路において、 一般のテレビジヨン受像機の映像ＩＦ回路のＩ
Ｃを用い、 該ＩＣからＡＧＣフイルタへ接続される時定数
可変用出力端子に定電圧素子を接続して該出力端
子電圧を該定電圧素子により決定される電圧で規
制する構成としてなるＣＡＴＶ用映像ＩＦ回路。[Claim for Utility Model Registration] The IF input signal is amplified by an IF amplifier, and the video signal obtained by detection is subjected to AGC.
In a video IF circuit configured to feed back to the F amplifier and IF input side, the I of the video IF circuit of a general television receiver is
A CATV video having a configuration in which a constant voltage element is connected to a time constant variable output terminal connected from the IC to an AGC filter, and the output terminal voltage is regulated by a voltage determined by the constant voltage element. IF circuit.
JP1990057818U 1990-05-31 1990-05-31 Video IF circuit for CATV Expired - Lifetime JPH071891Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990057818U JPH071891Y2 (en) 1990-05-31 1990-05-31 Video IF circuit for CATV

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990057818U JPH071891Y2 (en) 1990-05-31 1990-05-31 Video IF circuit for CATV

Publications (2)

Publication Number Publication Date
JPH0419879U true JPH0419879U (en) 1992-02-19
JPH071891Y2 JPH071891Y2 (en) 1995-01-18

Family

ID=31582871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990057818U Expired - Lifetime JPH071891Y2 (en) 1990-05-31 1990-05-31 Video IF circuit for CATV

Country Status (1)

Country Link
JP (1) JPH071891Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5536663U (en) * 1978-08-31 1980-03-08
JPS5778283A (en) * 1980-10-31 1982-05-15 Mitsubishi Electric Corp Video detection circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5536663U (en) * 1978-08-31 1980-03-08
JPS5778283A (en) * 1980-10-31 1982-05-15 Mitsubishi Electric Corp Video detection circuit

Also Published As

Publication number Publication date
JPH071891Y2 (en) 1995-01-18

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