JPS5559533A - Switch matrix device - Google Patents

Switch matrix device

Info

Publication number
JPS5559533A
JPS5559533A JP13361678A JP13361678A JPS5559533A JP S5559533 A JPS5559533 A JP S5559533A JP 13361678 A JP13361678 A JP 13361678A JP 13361678 A JP13361678 A JP 13361678A JP S5559533 A JPS5559533 A JP S5559533A
Authority
JP
Japan
Prior art keywords
row
low level
potential
circuit
switch
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
Application number
JP13361678A
Other languages
Japanese (ja)
Other versions
JPS5713012B2 (en
Inventor
Kuniaki Makabe
Yoshinori Morita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13361678A priority Critical patent/JPS5559533A/en
Publication of JPS5559533A publication Critical patent/JPS5559533A/en
Publication of JPS5713012B2 publication Critical patent/JPS5713012B2/ja
Granted legal-status Critical Current

Links

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  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To secure an accurate detection for the address of the closing switch in a simple constitution by incorporating the switch closing detecting means as well as the switching means which gives the first potential to either one of the row and column lead wire groups along with the second potential given to the other group.
CONSTITUTION: The switches which select each row and column lead wires are installed at cross points SooWSnn between row lead wires yoWyn and column wires xoWxn each. The switching means which gives the first potential low level and 2nd potential high level to the lead wire groups is formed with 1-shot pulse generator circuits 11W13 plus tristate buffers XoWXn, Xo'WXn', YoWYn and Yo'W Yn' each. When Q1 and Q2 of circuit 12 feature a high and low level each, the row lead wires all feature the low levels via buffers YoWYn. With closure of switch SiJ, only wire xi feature a low level. And Q1 and Q2 of circuit 12 are reversed by the detection pulses sent from switch closing detector circuit 3. As a result, only wire yi features a low level via buffers XoWXn, and the address of Sij is selected via latch circuits 14 and 15 and by the signals sent from circuit 13 to be supplied to encoder 16.
COPYRIGHT: (C)1980,JPO&Japio
JP13361678A 1978-10-30 1978-10-30 Switch matrix device Granted JPS5559533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13361678A JPS5559533A (en) 1978-10-30 1978-10-30 Switch matrix device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13361678A JPS5559533A (en) 1978-10-30 1978-10-30 Switch matrix device

Publications (2)

Publication Number Publication Date
JPS5559533A true JPS5559533A (en) 1980-05-06
JPS5713012B2 JPS5713012B2 (en) 1982-03-15

Family

ID=15108972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13361678A Granted JPS5559533A (en) 1978-10-30 1978-10-30 Switch matrix device

Country Status (1)

Country Link
JP (1) JPS5559533A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275527U (en) * 1978-12-20 1987-05-14
KR100971580B1 (en) 2008-05-13 2010-07-20 주식회사 포인칩스 Apparatus for detecting input operation in a switching matrix
CN102522983A (en) * 2011-12-16 2012-06-27 宝鸡石油机械有限责任公司 Matrix array switching value driver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998166A (en) * 1973-01-19 1974-09-17
JPS52142925A (en) * 1976-05-25 1977-11-29 Ricoh Co Ltd Key input system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4998166A (en) * 1973-01-19 1974-09-17
JPS52142925A (en) * 1976-05-25 1977-11-29 Ricoh Co Ltd Key input system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275527U (en) * 1978-12-20 1987-05-14
KR100971580B1 (en) 2008-05-13 2010-07-20 주식회사 포인칩스 Apparatus for detecting input operation in a switching matrix
CN102522983A (en) * 2011-12-16 2012-06-27 宝鸡石油机械有限责任公司 Matrix array switching value driver

Also Published As

Publication number Publication date
JPS5713012B2 (en) 1982-03-15

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