JPS5559533A - Switch matrix device - Google Patents
Switch matrix deviceInfo
- 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
Links
Landscapes
- 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
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)
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)
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 |
-
1978
- 1978-10-30 JP JP13361678A patent/JPS5559533A/en active Granted
Patent Citations (2)
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)
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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