JPS5454513A - Scanning circuit - Google Patents
Scanning circuitInfo
- Publication number
- JPS5454513A JPS5454513A JP12174377A JP12174377A JPS5454513A JP S5454513 A JPS5454513 A JP S5454513A JP 12174377 A JP12174377 A JP 12174377A JP 12174377 A JP12174377 A JP 12174377A JP S5454513 A JPS5454513 A JP S5454513A
- Authority
- JP
- Japan
- Prior art keywords
- selection
- load
- scanning
- selection line
- embodyment
- 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
Abstract
PURPOSE:To perform efficient scanning for the embodyment of load, with a simple constitution, by connecting the switching element at the both sides of load and the external blocking diode at one side and bypassing the bias current in the matrix at non-selection and the load current. CONSTITUTION:In the switch part to arbitrary load Rij in a number of loads in matrix connection, the scanning switch 6 is connected to one end of each selection line of the first selection line group and the other end is commonly connected to the DC power supply 1 via the protective resistor 2. Further, at one end of the second selection line, the scanning switch 5 is connected, and the other end is commonly connected to the load current sensing resistor 4 via the external blocking diode 7. Further, the scanning switches 5 and 6 are made conductive when non- selection, and not conductive when selection. Thus, the embodyment of loads in matrix connection can efficiently be scanned with a simple constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52121743A JPS6012832B2 (en) | 1977-10-11 | 1977-10-11 | scanning circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52121743A JPS6012832B2 (en) | 1977-10-11 | 1977-10-11 | scanning circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5454513A true JPS5454513A (en) | 1979-04-28 |
JPS6012832B2 JPS6012832B2 (en) | 1985-04-03 |
Family
ID=14818771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52121743A Expired JPS6012832B2 (en) | 1977-10-11 | 1977-10-11 | scanning circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6012832B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58130667A (en) * | 1982-01-29 | 1983-08-04 | Ricoh Co Ltd | Sensor array driving circuit |
JPS6068767A (en) * | 1984-07-27 | 1985-04-19 | Hitachi Ltd | Photodetector |
-
1977
- 1977-10-11 JP JP52121743A patent/JPS6012832B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58130667A (en) * | 1982-01-29 | 1983-08-04 | Ricoh Co Ltd | Sensor array driving circuit |
JPS6068767A (en) * | 1984-07-27 | 1985-04-19 | Hitachi Ltd | Photodetector |
JPH0420305B2 (en) * | 1984-07-27 | 1992-04-02 | Hitachi Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS6012832B2 (en) | 1985-04-03 |
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