JPS5454513A - Scanning circuit - Google Patents

Scanning circuit

Info

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
Application number
JP12174377A
Other languages
Japanese (ja)
Other versions
JPS6012832B2 (en
Inventor
Kentaro Tokikuni
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP52121743A priority Critical patent/JPS6012832B2/en
Publication of JPS5454513A publication Critical patent/JPS5454513A/en
Publication of JPS6012832B2 publication Critical patent/JPS6012832B2/en
Expired legal-status Critical Current

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.
JP52121743A 1977-10-11 1977-10-11 scanning circuit Expired JPS6012832B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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