JPS55112628A - Bus coupling system - Google Patents
Bus coupling systemInfo
- Publication number
- JPS55112628A JPS55112628A JP2044879A JP2044879A JPS55112628A JP S55112628 A JPS55112628 A JP S55112628A JP 2044879 A JP2044879 A JP 2044879A JP 2044879 A JP2044879 A JP 2044879A JP S55112628 A JPS55112628 A JP S55112628A
- Authority
- JP
- Japan
- Prior art keywords
- main signal
- pkg1
- pkg
- pkg3
- signal path
- 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 prevent the production of error due to insertion or de-insertion of the package (PKG), by turning on or off the gate circuit provided at the main signal path of package (PKG) with the power supply voltage application detection circuit having a time constant.
CONSTITUTION: PKG1, 2, 3 have inverters 12, 22, 31 on the main signal path, PKG1, 2 have the gate circuit consisting of the transistors Tr13, 23 on the main signal path and power supply application detection circuits 11, 21 and coupled with the bus and connected to PKG3. In normal state, Tr13, 23 turn on and the signals of PKG1, 2 are delivered to PKG3 in time sharing. When PKG1 is once de-inserted and again inserted, the supply voltage Vcc is disconnected and the voltage is restored at re-insertion, and the capacitor 19 of the circuit 11 is charged. When charging progresses, Tr16 turns on, then Tr13 turns on and the main signal through the inverter 12 is delivered to PKG3. Thus, even with insertion or de-insertion of PKG, the main signal of other PKG is not disturbed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2044879A JPS55112628A (en) | 1979-02-22 | 1979-02-22 | Bus coupling system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2044879A JPS55112628A (en) | 1979-02-22 | 1979-02-22 | Bus coupling system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55112628A true JPS55112628A (en) | 1980-08-30 |
Family
ID=12027335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2044879A Pending JPS55112628A (en) | 1979-02-22 | 1979-02-22 | Bus coupling system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55112628A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6076838A (en) * | 1983-10-04 | 1985-05-01 | Nec Corp | Unit interface circuit |
JPH01159714A (en) * | 1987-12-16 | 1989-06-22 | Yokogawa Electric Corp | Electronic circuit unit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947059A (en) * | 1972-09-13 | 1974-05-07 | ||
JPS5359330A (en) * | 1976-11-09 | 1978-05-29 | Fuji Electric Co Ltd | Mis-output preventing system |
-
1979
- 1979-02-22 JP JP2044879A patent/JPS55112628A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947059A (en) * | 1972-09-13 | 1974-05-07 | ||
JPS5359330A (en) * | 1976-11-09 | 1978-05-29 | Fuji Electric Co Ltd | Mis-output preventing system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6076838A (en) * | 1983-10-04 | 1985-05-01 | Nec Corp | Unit interface circuit |
JPH01159714A (en) * | 1987-12-16 | 1989-06-22 | Yokogawa Electric Corp | Electronic circuit unit |
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