JPS5837219U

JPS5837219U - wideband amplifier

Info

Publication number: JPS5837219U
Application number: JP13043281U
Authority: JP
Inventors: 佐々木　良晴
Original assignee: 日本電気ホームエレクトロニクス株式会社
Priority date: 1981-08-31
Filing date: 1981-08-31
Publication date: 1983-03-10

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案に係る増幅器のブロック図、第２図は第
１図の要部回路図、第３図及び第４図は従来の整合回路
図、及び第５図は本考案の具体例であるＮＦメータの要
部回路図である。１、　２．　２０・・・信号源側入力端子、１３．２１
・・・入力整合回路、１４．２３・・・増幅素子、１５
・・・入力側インピーダンス、１６．１７・・・コイル
、１８・・・抵抗、２７・・・出力端子。Figure 1 is a block diagram of an amplifier according to the present invention, Figure 2 is a circuit diagram of the main part of Figure 1, Figures 3 and 4 are conventional matching circuit diagrams, and Figure 5 is a specific example of the present invention. FIG. 2 is a circuit diagram of a main part of an NF meter. 1, 2. 20...Signal source side input terminal, 13.21
...Input matching circuit, 14.23...Amplification element, 15
...Input side impedance, 16.17...Coil, 18...Resistance, 27...Output terminal.

Claims

[Scope of utility model registration request]

In an input matching circuit that matches the input side impedance of the amplifier to the predetermined impedance of the signal source side input terminal,
The input matching circuit is composed of an inductance coil connected in series between the input terminal and the amplifier, and a series circuit of an inductance coil and a resistor connected in parallel with the amplifier, and the value of the resistance of the series circuit is set to the input satin. A wideband amplifier characterized in that the impedance is selected within a range of approximately 2 to 3 times the predetermined impedance of the amplifier, and matching is performed in a wide band from 0.1 MHz to 100 to iHz.