JPS62158964U - - Google Patents
Info
- Publication number
- JPS62158964U JPS62158964U JP4479286U JP4479286U JPS62158964U JP S62158964 U JPS62158964 U JP S62158964U JP 4479286 U JP4479286 U JP 4479286U JP 4479286 U JP4479286 U JP 4479286U JP S62158964 U JPS62158964 U JP S62158964U
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- audio frequency
- light emitting
- public telephone
- light receiving
- 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 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Prepayment Telephone Systems (AREA)
Description
図は本考案の実施例を示す回路図である。
１……ＴＫＣ（通話回路）、２……ＰＣ（フオ
トカプラ）、３……ＤＲ（ドライバ）、４……Ｃ
ＮＴ（制御回路）、Ｒ……受話器、Ｒ１，Ｒ２…
…抵抗器。
The figure is a circuit diagram showing an embodiment of the present invention. 1...TKC (communication circuit), 2...PC (photocoupler), 3...DR (driver), 4...C
NT (control circuit), R...receiver, R1 , R2 ...
…Resistor.
Claims (1)
送出する回路において、受話器のインピーダンス
よりも高いインピーダンスを有するインピーダン
ス素子と、該インピーダンス素子を介して前記受
話器に対し並列に接続された受光素子と、該受光
素子と光学的に結合された発光素子と、該発光素
子を駆動する可聴周波信号源とを備えたことを特
徴とする公衆電話機の催促音送出回路。 In a circuit that sends an audio frequency reminder to a user of a public telephone, an impedance element having an impedance higher than an impedance of a receiver, and a light receiving element connected in parallel to the receiver via the impedance element; 1. A reminder tone sending circuit for a public telephone, comprising: a light emitting element optically coupled to the light receiving element; and an audio frequency signal source for driving the light emitting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4479286U JPS62158964U (en) | 1986-03-28 | 1986-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4479286U JPS62158964U (en) | 1986-03-28 | 1986-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62158964U true JPS62158964U (en) | 1987-10-08 |
Family
ID=30862935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4479286U Pending JPS62158964U (en) | 1986-03-28 | 1986-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62158964U (en) |
-
1986
- 1986-03-28 JP JP4479286U patent/JPS62158964U/ja active Pending