JPS601057U

JPS601057U - CATV converter

Info

Publication number: JPS601057U
Application number: JP9238783U
Authority: JP
Inventors: 高浜　勝明
Original assignee: 日本電気ホームエレクトロニクス株式会社
Priority date: 1983-06-15
Filing date: 1983-06-15
Publication date: 1985-01-07

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 drawings]

第１図及び第２図は本考案の前提となる回路図、第３図
は本考案のＣＡＴＶコンバータのＩＦ出力利゛得の補正
回路図、第４図及び第５図は第３図に用いるＦＥＴの特
性図、第６図は本考案のＣＡＴＶコンバータのブロック
図、及び第７図は第６図の具体的回路図である。１０・・・・・・利得補正回路、１１・・・・・・ＦＥ
Ｔ、１２・・・・・・出力側同調回路、１３・・・・・
・可変抵抗器、１４・・・・・・出力端子。 −で、　　　　　　　　　　Ｉ　＝− ｊ　ｒ　　　−−−−一事−−−−−−１一シより／α ｒ−−＝＋−”−＋−一一刊Figures 1 and 2 are circuit diagrams that are the premise of the present invention, Figure 3 is a circuit diagram for correcting the IF output gain of the CATV converter of the present invention, and Figures 4 and 5 are used in Figure 3. A characteristic diagram of the FET, FIG. 6 is a block diagram of the CATV converter of the present invention, and FIG. 7 is a specific circuit diagram of FIG. 10...gain correction circuit, 11...FE
T, 12... Output side tuning circuit, 13...
・Variable resistor, 14... Output terminal. −, I =− j r −−−−Ichigo−−−−−−1 From Ichishi/α r−−=+−”−+−11th edition

Claims

[Scope of utility model registration request]

A VHFHF medium channel input signal from an input terminal is converted into a first IF signal having a predetermined UHF band frequency by a first frequency conversion means including an input stage, a first local oscillation stage, a first mixer, and a first IF amplification stage. upconversion section and
A down converter converts the first IF signal into a 21F signal having a predetermined VHF band frequency by a second frequency conversion means including a second local oscillation stage, a second mixer stage, and a 21F amplification stage, and derives the signal from an output terminal. - the second IF amplification stage is a junction FET;
between the source electrode and ground.
A CATV converter in which a variable resistor is inserted into the CATV converter to correct the gain of the second IP signal derived from the output terminal.