JPS57147355A - Preventing circuit for faulty transmission - Google Patents
Preventing circuit for faulty transmissionInfo
- Publication number
- JPS57147355A JPS57147355A JP56032103A JP3210381A JPS57147355A JP S57147355 A JPS57147355 A JP S57147355A JP 56032103 A JP56032103 A JP 56032103A JP 3210381 A JP3210381 A JP 3210381A JP S57147355 A JPS57147355 A JP S57147355A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- oscillator
- gate
- transmission
- power voltage
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE:To prevent faulty transmission from a station to be monitored by monitoring the power voltage of a logical part for generation of a transmission start signal, and stopping the operation of an oscillator for modulation when the voltage drops below an IC operation ensuring voltage. CONSTITUTION:When a power voltage V1 is normal, an oscillator 1 for modulation starts oscillation and if a transmission start signal is supplied from a logical part 2 to a gate 5, a carrier signal is sent to a transmission line 7. If the power voltage V1 drops below the IC operation ensuring voltage of the logical part 2 set by resistances R5 and R6, a transistor TR1 turns off. Consequently, a capacitor C1 is discharged instantaneously through a diode D1 and a resistance R3 and a gate 10 turns on. Therefore, the oscillation of the oscillator 1 stops, so the logic part 2 operates unstably owing to the drop in voltage V1, preventing the carrier signal from being sent to the transmission line 7 even if the gate 5 is opened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56032103A JPS57147355A (en) | 1981-03-06 | 1981-03-06 | Preventing circuit for faulty transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56032103A JPS57147355A (en) | 1981-03-06 | 1981-03-06 | Preventing circuit for faulty transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57147355A true JPS57147355A (en) | 1982-09-11 |
JPH0143498B2 JPH0143498B2 (en) | 1989-09-21 |
Family
ID=12349559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56032103A Granted JPS57147355A (en) | 1981-03-06 | 1981-03-06 | Preventing circuit for faulty transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57147355A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5045505A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS5129003A (en) * | 1974-09-05 | 1976-03-11 | Tokyo Electric Power Co |
-
1981
- 1981-03-06 JP JP56032103A patent/JPS57147355A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5045505A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS5129003A (en) * | 1974-09-05 | 1976-03-11 | Tokyo Electric Power Co |
Also Published As
Publication number | Publication date |
---|---|
JPH0143498B2 (en) | 1989-09-21 |
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