JPS61166643U - - Google Patents
Info
- Publication number
- JPS61166643U JPS61166643U JP5014885U JP5014885U JPS61166643U JP S61166643 U JPS61166643 U JP S61166643U JP 5014885 U JP5014885 U JP 5014885U JP 5014885 U JP5014885 U JP 5014885U JP S61166643 U JPS61166643 U JP S61166643U
- Authority
- JP
- Japan
- Prior art keywords
- switch
- circuit
- ground line
- terminal
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案実施例回路の構成を示すブロツ
ク構成図。第２図は従来例回路の構成を示すブロ
ツク構成図。
１，２…通話線端子、３…アース端子、４…電
話機回路、５…電話機、Ｒ…抵抗器、ＳＴ…整流
ブリツジ回路、ＳＷ…スイツチ、ＴＲ…トランジ
スタ。
FIG. 1 is a block configuration diagram showing the configuration of a circuit according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a conventional circuit. 1, 2...Talking line terminal, 3...Earth terminal, 4...Telephone circuit, 5...Telephone, R...Resistor, ST...Rectifier bridge circuit, SW...Switch, TR...Transistor.
Claims (1)
とを備えた三線式電話機に付加され、通話線端子
の一方にアース線を接続させるアースリコールス
イツチ回路において、 上記通話線端子の一方と上記アース線端子との
間に交流入力端子が接続された整流ブリツジ回路
と、 この整流ブリツジ回路の直流出力端子にエミツ
タ電極およびコレクタ電極がそれぞれ接続された
トランジスタと、 このトランジスタのゲート電極とコレクタ電極
との間に挿入された抵抗器および手動スイツチの
直列回路と を備えたことを特徴とするアースリコールスイツ
チ回路。 (2) スイツチがゴム接点を有するスイツチであ
る実用新案登録請求の範囲第(1)項に記載のアー
スリコールスイツチ回路。[Scope of Claim for Utility Model Registration] (1) In an earth recall switch circuit that is added to a three-wire telephone equipped with two telephone line terminals and one ground line terminal and connects the ground line to one of the telephone line terminals. , a rectifier bridge circuit having an AC input terminal connected between one of the communication line terminals and the ground line terminal; a transistor having an emitter electrode and a collector electrode respectively connected to the DC output terminal of the rectifier bridge circuit; An earth recall switch circuit comprising a resistor inserted between the gate electrode and collector electrode of this transistor and a series circuit of a manual switch. (2) The earth recall switch circuit according to claim (1), wherein the switch is a switch having a rubber contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5014885U JPS61166643U (en) | 1985-04-04 | 1985-04-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5014885U JPS61166643U (en) | 1985-04-04 | 1985-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61166643U true JPS61166643U (en) | 1986-10-16 |
Family
ID=30568010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5014885U Pending JPS61166643U (en) | 1985-04-04 | 1985-04-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61166643U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141862A (en) * | 1983-02-01 | 1984-08-14 | Nec Corp | Sharing system between emergency telephone device and maintenance telephone device |
-
1985
- 1985-04-04 JP JP5014885U patent/JPS61166643U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141862A (en) * | 1983-02-01 | 1984-08-14 | Nec Corp | Sharing system between emergency telephone device and maintenance telephone device |
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