JPH0284484U - - Google Patents
Info
- Publication number
- JPH0284484U JPH0284484U JP16322988U JP16322988U JPH0284484U JP H0284484 U JPH0284484 U JP H0284484U JP 16322988 U JP16322988 U JP 16322988U JP 16322988 U JP16322988 U JP 16322988U JP H0284484 U JPH0284484 U JP H0284484U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- resistor
- transistor
- control stage
- stage transistor
- 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
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Interface Circuits In Exchanges (AREA)
Description
第１図は本考案の一実施例を示す要部回路図、
第２図は従来装置の構成を説明するためのブロツ
ク図、第３図は従来例を説明するための回路構成
図である。
２１……トランス、ＴＲ１，ＴＲ２……トラン
ジスタ、２２，Ｃ１……コンデンサ、ＣＤ１……
ダイオード、Ｒ１，Ｒ２……抵抗。
FIG. 1 is a main circuit diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram for explaining the configuration of a conventional device, and FIG. 3 is a circuit configuration diagram for explaining the conventional example. 21...Transistor, TR1, TR2...Transistor, 22, C1...Capacitor, CD1...
Diode, R1, R2...resistance.
Claims (1)
ランク直流吸込回路において、 直流ループ形成用トランジスタとこれを駆動す
る制御段トランジスタとをダーリントン接続し、
前記局線の線間に前記直流ループ形成用トランジ
スタを接続するとともに抵抗とコンデンサの直列
回路を前記局線の線間に接続し、この抵抗とコン
デンサの接続点を前記制御段トランジスタのベー
スに接続して局線供給電圧を制御段トランジスタ
に供給する構成とし、抵抗はベース電流制限用と
するとともにコンデンサは交流成分バイパス用と
して用いる構成とすることを特徴とする局線トラ
ンク直流吸込回路。[Scope of Claim for Utility Model Registration] In a station line trunk DC suction circuit for forming a DC loop for the station line, a DC loop forming transistor and a control stage transistor for driving the same are connected in a Darlington manner,
The DC loop forming transistor is connected between the central lines, and a series circuit of a resistor and a capacitor is connected between the central lines, and the connection point of this resistor and capacitor is connected to the base of the control stage transistor. What is claimed is: 1. A central office line trunk direct current suction circuit, characterized in that the central office line supply voltage is supplied to a control stage transistor, a resistor is used for limiting base current, and a capacitor is used for bypassing an alternating current component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16322988U JPH0284484U (en) | 1988-12-16 | 1988-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16322988U JPH0284484U (en) | 1988-12-16 | 1988-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0284484U true JPH0284484U (en) | 1990-06-29 |
Family
ID=31447769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16322988U Pending JPH0284484U (en) | 1988-12-16 | 1988-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0284484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995011549A1 (en) * | 1993-10-19 | 1995-04-27 | Tokyo Tsuki Co., Ltd. | Direct-current impressing circuit |
-
1988
- 1988-12-16 JP JP16322988U patent/JPH0284484U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995011549A1 (en) * | 1993-10-19 | 1995-04-27 | Tokyo Tsuki Co., Ltd. | Direct-current impressing circuit |
| AU677444B2 (en) * | 1993-10-19 | 1997-04-24 | Tokyo Tsuki Co., Ltd. | Direct-current impressing circuit |
| US5796279A (en) * | 1993-10-19 | 1998-08-18 | Tokyo Tsuki Co., Ltd. | DC application circuit with suppressed DC magnetization |