JPS646878A - Differential digital transmission line - Google Patents
Differential digital transmission lineInfo
- Publication number
- JPS646878A JPS646878A JP62161338A JP16133887A JPS646878A JP S646878 A JPS646878 A JP S646878A JP 62161338 A JP62161338 A JP 62161338A JP 16133887 A JP16133887 A JP 16133887A JP S646878 A JPS646878 A JP S646878A
- Authority
- JP
- Japan
- Prior art keywords
- line
- transmission line
- level
- outputs
- differential digital
- 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
Abstract
PURPOSE:To detect the disconnection of a differential digital transmission line by a few parts by connecting two photocouplers to the power reception terminal of the differential digital transmission line so that the polarities of their input parts are opposite to the transmission line. CONSTITUTION:A line driver 2 combines and sends out positive and negative path signals Q and -Q to the line of the transmission line at the same time. A photocoupler 3 whose input part is connected to the power reception terminal in the positive direction of the line 1 is used as a line receiver and a LED 4 is activated when a pulse signal Q is at high level to outputs a high-level signal 5. A photocoupler 6, on the other hand, has its input part connected in the opposite direction from said line 1 and an LED 7 outputs a high-level signal 8 when the pulse -Q is at high level. If the line 1 of the transmission line becomes abnormal, the output signals 5 and 8 of both photocouplers 3 and 6 turn off, i.e. low and a NOR circuit 11 outputs a high-level disconnection warning signal 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161338A JPS646878A (en) | 1987-06-30 | 1987-06-30 | Differential digital transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161338A JPS646878A (en) | 1987-06-30 | 1987-06-30 | Differential digital transmission line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS646878A true JPS646878A (en) | 1989-01-11 |
Family
ID=15733181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62161338A Pending JPS646878A (en) | 1987-06-30 | 1987-06-30 | Differential digital transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS646878A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0784207A1 (en) * | 1995-07-26 | 1997-07-16 | Ntt Data Corporation | Lan tester |
-
1987
- 1987-06-30 JP JP62161338A patent/JPS646878A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0784207A1 (en) * | 1995-07-26 | 1997-07-16 | Ntt Data Corporation | Lan tester |
EP0784207A4 (en) * | 1995-07-26 | 2001-08-22 | Ntt Data Corp | Lan tester |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6472724A (en) | Electronic endoscopic apparatus | |
EP0358501A3 (en) | Programmable input/output circuit | |
CA2085751A1 (en) | Device for monitoring a control unit | |
JPS6413842A (en) | Digital differential signal transmitter | |
EP0368528A3 (en) | Audio amplifier with mute and stand-by states | |
CA2032966A1 (en) | Domestic appliance having electrically isolated input control circuitry | |
EP0920134A3 (en) | Interface circuit | |
EP0359261A3 (en) | Subsignal transmitting system | |
JPS646878A (en) | Differential digital transmission line | |
JPS5730427A (en) | Signal automatic switching circuit | |
JPS5696562A (en) | Connection circuit for transmission line | |
JPS5744356A (en) | Ais signal detecting circuit | |
JPS6481412A (en) | Input buffer circuit | |
JPS56162536A (en) | Sequential switcher | |
JPS6460036A (en) | Frame signal transmitting system | |
JPS57181251A (en) | Data transmission system | |
JPS5538721A (en) | Polarity deciding system for transmission signal | |
JPS5642416A (en) | Coupled circuit for input-output unit | |
JPS56152357A (en) | Offset potential applying method | |
JPS6413623A (en) | Carry signal look ahead circuit | |
WO2003073146B1 (en) | Combination connector | |
SU1840159A1 (en) | Power limiter | |
JPS564952A (en) | Transmission system for vehicle sensing signal | |
JPS6462928A (en) | Optical repeater | |
JPS55137746A (en) | Anomaly decision system of data transmission system |