JPS60164242U - key scan circuit - Google Patents
key scan circuitInfo
- Publication number
- JPS60164242U JPS60164242U JP4936084U JP4936084U JPS60164242U JP S60164242 U JPS60164242 U JP S60164242U JP 4936084 U JP4936084 U JP 4936084U JP 4936084 U JP4936084 U JP 4936084U JP S60164242 U JPS60164242 U JP S60164242U
- Authority
- JP
- Japan
- Prior art keywords
- lines
- control line
- output
- scan circuit
- key scan
- 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)
- Electronic Switches (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例の回路構成図、第２図は本考案の一実施
例を回路構成図、第３図は駆動波形図である。
１１．１２・・・・・・入力線、１３，１４・・・・・
・出力線、１５・・・・・・抵抗、１６・・曲スイッチ
、１７・・曲ダイオード、１８・・・・・・制御線。FIG. 1 is a circuit diagram of a conventional example, FIG. 2 is a circuit diagram of an embodiment of the present invention, and FIG. 3 is a drive waveform diagram. 11.12...Input line, 13,14...
- Output line, 15... Resistor, 16... Curved switch, 17... Curved diode, 18... Control line.
Claims (1)
と出力線とは格子状に配置され、その格子点にスイッチ
を備えると共に、各入力線は抵抗素子を経由して制御線
に接続されてなり、出力線がローアクティブ信号を出す
時に制御線はハイ゛レヘルに、また、出力線がハイアク
ティブ信号を出す時に制御線はローレベルになるように
、制御線の信号レベルを切換え゛ることを特徴とするキ
ースキャン回路。It has an arbitrary number of input lines, output lines, and control lines, and the input lines and output lines are arranged in a grid, and switches are provided at the grid points, and each input line connects to the control line via a resistor element. The signal level of the control line is set so that when the output line outputs a low active signal, the control line goes to high level, and when the output line outputs a high active signal, the control line goes to low level. A key scan circuit characterized by switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984049360U JPH0637466Y2 (en) | 1984-04-03 | 1984-04-03 | Key scan circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984049360U JPH0637466Y2 (en) | 1984-04-03 | 1984-04-03 | Key scan circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60164242U true JPS60164242U (en) | 1985-10-31 |
| JPH0637466Y2 JPH0637466Y2 (en) | 1994-09-28 |
Family
ID=30566484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984049360U Expired - Lifetime JPH0637466Y2 (en) | 1984-04-03 | 1984-04-03 | Key scan circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637466Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58215814A (en) * | 1982-06-10 | 1983-12-15 | Nec Corp | Key input detecting circuit |
-
1984
- 1984-04-03 JP JP1984049360U patent/JPH0637466Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58215814A (en) * | 1982-06-10 | 1983-12-15 | Nec Corp | Key input detecting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0637466Y2 (en) | 1994-09-28 |
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