JPH0475423U - - Google Patents

Description

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

第１図は本考案にかかるπ型減衰量可変アツテ
ネータ回路の回路図、第２図は本考案の第２実施
例のＬ型減衰量可変アツテネータ回路の回路図、
第３図は従来のアツテネータ回路の回路図、第４
図、第５図は第３図の回路の減衰量大、小時の等
価回路、第６図は第３図のアツテネータ回路の減
衰特性、第７図は本考案に用いるチツプコンデン
サの共振特性である。 １ａ，１ｂ……コンデンサ、Ｒ１，Ｒ２……イ
ンピーダンス整合用抵抗、ＰＩＮ１，２，３，４
……ＰＩＮダイオード。 FIG. 1 is a circuit diagram of a π-type variable attenuation attenuator circuit according to the present invention, and FIG. 2 is a circuit diagram of an L-type variable attenuation attenuator circuit according to a second embodiment of the present invention.
Figure 3 is a circuit diagram of a conventional attenuator circuit;
Figure 5 shows the equivalent circuit of the circuit in Figure 3 when the attenuation is large and small, Figure 6 shows the attenuation characteristics of the attenuator circuit in Figure 3, and Figure 7 shows the resonance characteristics of the chip capacitor used in the present invention. . 1a, 1b... Capacitor, R1, R2... Impedance matching resistor, PIN1, 2, 3, 4
...PIN diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ダイオードで構成された減衰量可変のアツテネ
ータ回路であつて、前記のアツテネータ回路の信
号路とＧＮＤ間に、インピーダンス整合用抵抗と
信号周波数に略等しい自己共振特性を有するコン
デンサとの並列回路、それに直列に接続するダイ
オードを有することを特徴とするアツテネータの
回路構成。 An attenuator circuit with variable attenuation comprised of diodes, which includes a parallel circuit of an impedance matching resistor and a capacitor having self-resonance characteristics approximately equal to the signal frequency, and a parallel circuit connected in series between the signal path of the attenuator circuit and GND. A circuit configuration of an attenuator characterized by having a diode connected to the attenuator.