JPS55112628A - Bus coupling system - Google Patents

Bus coupling system

Info

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
Application number
JP2044879A
Other languages
Japanese (ja)
Inventor
Kuniaki Kihara
Kazuo Nishitani
Hiroyuki Kitahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2044879A priority Critical patent/JPS55112628A/en
Publication of JPS55112628A publication Critical patent/JPS55112628A/en
Pending legal-status Critical Current

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  • Logic Circuits (AREA)

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
JP2044879A 1979-02-22 1979-02-22 Bus coupling system Pending JPS55112628A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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