JPS61171310U - - Google Patents
Info
- Publication number
- JPS61171310U JPS61171310U JP5363185U JP5363185U JPS61171310U JP S61171310 U JPS61171310 U JP S61171310U JP 5363185 U JP5363185 U JP 5363185U JP 5363185 U JP5363185 U JP 5363185U JP S61171310 U JPS61171310 U JP S61171310U
- Authority
- JP
- Japan
- Prior art keywords
- collector
- current
- transistor
- current amplifier
- bases
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図はカレントアンプの基本構成図、第３図はその
電流ゲインの周波数特性を示す図、第４図は従来
の回路例でＩＣ化した場合の構成を示す。
Ｑ１，Ｑ２，Ｑ３……トランジスタ、Ｒ１，Ｒ
２，Ｒ３，Ｒｘ……抵抗、Ｃｘ……コンデンサ、
Ｃｊｃ……ベース・コレクタ接合容量、Ｖ１，Ｖ
２……電源、Ｄ１……ダイオード。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
FIG. 3 is a diagram showing the basic configuration of a current amplifier, FIG. 3 is a diagram showing the frequency characteristics of the current gain, and FIG. 4 is a diagram showing the configuration of a conventional circuit implemented as an IC. Q1, Q2, Q3...transistor, R1, R
2, R3, R x ...resistance, C x ... capacitor,
C jc ...Base-collector junction capacitance, V1, V
2...Power supply, D1...Diode.
Claims (1)
、フイードバツクトランジスタＱ２からなり、Ｑ
１，Ｑ３のベースが互いに接続され、Ｑ２のエミ
ツタはかかるＱ１，Ｑ３のベースに、Ｑ２のベー
スはＱ１のコレクタに接続され、Ｑ１のコレクタ
から電流注入され、Ｑ３のコレクタから出力電流
を得るように構成されたカレントアンプにおいて
、Ｑ２のトランジスタを複数セルで構成すること
で、コレクタ・ベース間接合容量を増加させ、か
つ、Ｑ２と電源に直列にＲｘを設けることで、Ｃ
ｊｃとＲｘによつて、Ｑ２にミラー帰還を生じさ
せ、かかるカレントアンプの高周波特性を制御す
ることを特徴とするカレントアンプ回路。 Input transistor Q1, output transistor Q3
, a feedback transistor Q2, Q
The bases of Q1 and Q3 are connected to each other, the emitter of Q2 is connected to the bases of Q1 and Q3, and the base of Q2 is connected to the collector of Q1, so that current is injected from the collector of Q1 and output current is obtained from the collector of Q3. In the current amplifier configured in
A current amplifier circuit characterized in that mirror feedback is caused in Q2 by jc and Rx to control high frequency characteristics of the current amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5363185U JPS61171310U (en) | 1985-04-12 | 1985-04-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5363185U JPS61171310U (en) | 1985-04-12 | 1985-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61171310U true JPS61171310U (en) | 1986-10-24 |
Family
ID=30574678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5363185U Pending JPS61171310U (en) | 1985-04-12 | 1985-04-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61171310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05167361A (en) * | 1991-12-16 | 1993-07-02 | Mitsubishi Denki Eng Kk | Current amplifier circuit |
-
1985
- 1985-04-12 JP JP5363185U patent/JPS61171310U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05167361A (en) * | 1991-12-16 | 1993-07-02 | Mitsubishi Denki Eng Kk | Current amplifier circuit |