JPS5485645A - Data transmitting devicee - Google Patents
Data transmitting deviceeInfo
- Publication number
- JPS5485645A JPS5485645A JP15377577A JP15377577A JPS5485645A JP S5485645 A JPS5485645 A JP S5485645A JP 15377577 A JP15377577 A JP 15377577A JP 15377577 A JP15377577 A JP 15377577A JP S5485645 A JPS5485645 A JP S5485645A
- Authority
- JP
- Japan
- Prior art keywords
- point
- transmission line
- resistance
- current flows
- power supply
- 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
Landscapes
- Bidirectional Digital Transmission (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE: To secure the two-way transmission and reception as well as to reduce number of the transmission line and the amount of the circuit component, by providing the sharing intermediate transmission line from both terminals to the transmission and reception circuits which cross each other.
CONSTITUTION: Photo coupler FC 15 and 19 are provided with the input and output directions contrary to FC9 and 3 respectively, and the both terminals share DC stabilizing power supply unit 7 connected by intermediate transmission line 26. With closure of contact 4, FC3 is actuated to turn on transistor Tr6. Then the current flows to the negative side from the positive side of unit 7 via point G- point D of resistance 16 - transmission line 24 - point F - collector and emitter of Tr6 - point I, and then via point G - resistance 8 - primary LED of FC9 - point K - transmission line 26-point E - diode 17 - Tr6 - point I respectively. On the other hand, the current flows to the negative side from the positive side of DC stabilizing power supply unit 11 via point 0 - resistance 10 - photo transistor - point P, and thus the output voltage of output terminal 12 becomes zero to transmit the signals.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15377577A JPS5485645A (en) | 1977-12-20 | 1977-12-20 | Data transmitting devicee |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15377577A JPS5485645A (en) | 1977-12-20 | 1977-12-20 | Data transmitting devicee |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5485645A true JPS5485645A (en) | 1979-07-07 |
Family
ID=15569859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15377577A Pending JPS5485645A (en) | 1977-12-20 | 1977-12-20 | Data transmitting devicee |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5485645A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63288530A (en) * | 1987-05-20 | 1988-11-25 | Fujitsu Ten Ltd | Signal transmitter |
-
1977
- 1977-12-20 JP JP15377577A patent/JPS5485645A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63288530A (en) * | 1987-05-20 | 1988-11-25 | Fujitsu Ten Ltd | Signal transmitter |
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