JPS6157617U - - Google Patents

Description

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

第１図は本考案に係る高周波同調増幅器の回路
図、第２図は第１図の増幅器に係るインピーダン
ス回路図、第３図は第１図の増幅器の増幅周波数
特性図、第４図は本考案の他の実施例の回路図、
第５図は第４図の実施例に係るインピーダンス回
路図、第６図は本考案の更に他の実施例を示す回
路図、第７図は従来の高周波同調増幅器の回路図
、第８図は第７図の増幅器をパラメータ表示して
示す等価回路図、第９図は第７図の増幅器の出力
側をアドミタンス表示して示す等価回路図、第１
０図は第７図の増幅器の増幅周波数特性図である
。 ３，８，２０…コイル、２２，２６…コイル、
４，７，１９…コンデンサ、２４，２５，２７…
コンデンサ、５…入力並列同調回路、６…増幅用
トランジスタ、９…出力並列同調回路、１２…負
荷抵抗、１８，２３，２８…抵抗、２１…直列同
調回路。 Fig. 1 is a circuit diagram of a high frequency tuned amplifier according to the present invention, Fig. 2 is an impedance circuit diagram of the amplifier of Fig. 1, Fig. 3 is an amplification frequency characteristic diagram of the amplifier of Fig. 1, and Fig. 4 is a diagram of the present invention. Circuit diagrams of other embodiments of the invention;
FIG. 5 is an impedance circuit diagram according to the embodiment of FIG. 4, FIG. 6 is a circuit diagram showing still another embodiment of the present invention, FIG. 7 is a circuit diagram of a conventional high frequency tuned amplifier, and FIG. 8 is a circuit diagram of a conventional high frequency tuned amplifier. Fig. 9 is an equivalent circuit diagram showing the amplifier of Fig. 7 in terms of parameters; Fig. 9 is an equivalent circuit diagram showing the output side of the amplifier in Fig. 7 in admittance representation;
FIG. 0 is an amplification frequency characteristic diagram of the amplifier of FIG. 7. 3, 8, 20...coil, 22, 26...coil,
4, 7, 19... Capacitor, 24, 25, 27...
Capacitor, 5... Input parallel tuning circuit, 6... Amplifying transistor, 9... Output parallel tuning circuit, 12... Load resistor, 18, 23, 28... Resistor, 21... Series tuning circuit.

Claims (1)

【実用新案登録請求の範囲】 １ 増幅用トランジスタの入力側及び出力側にそ
れぞれ同調回路を有する高周波同調増幅器であつ
て、前記少なくとも一方の同調回路に、該同調回
路に対応する逆回路が接続されていることを特徴
とする高周波同調増幅器。 ２ 前記同調回路はコイル及びコンデンサが並列
接続されて成り、前記逆回路はコイル及びコンデ
ンサが直列接続されている直列同調回路を含むこ
とを特徴とする実用新案登録請求の範囲第１項に
記載の高周波同調増幅器。 ３ 前記同調回路はコイル及びコンデンサが並列
接続され、かつＱの大きな共振回路構成を有し、
前記逆回路はコイル及び抵抗の直列回路から成り
、前記同調回路と並列に接続されることを特徴と
する実用新案登録請求の範囲第１項に記載の高周
波同調増幅器。[Claims for Utility Model Registration] 1. A high frequency tuned amplifier having a tuning circuit on the input side and output side of an amplifying transistor, wherein at least one of the tuning circuits is connected to an inverse circuit corresponding to the tuning circuit. A high frequency tuned amplifier characterized by: 2. The utility model according to claim 1, wherein the tuned circuit includes a coil and a capacitor connected in parallel, and the inverse circuit includes a series tuned circuit in which a coil and a capacitor are connected in series. High frequency tuned amplifier. 3. The tuned circuit has a coil and a capacitor connected in parallel, and has a resonant circuit configuration with a large Q,
2. The high frequency tuned amplifier according to claim 1, wherein the inverse circuit comprises a series circuit of a coil and a resistor, and is connected in parallel with the tuned circuit.