JPS54931A - Detection circuit of failure of light quantity - Google Patents

Detection circuit of failure of light quantity

Info

Publication number
JPS54931A
JPS54931A JP6644777A JP6644777A JPS54931A JP S54931 A JPS54931 A JP S54931A JP 6644777 A JP6644777 A JP 6644777A JP 6644777 A JP6644777 A JP 6644777A JP S54931 A JPS54931 A JP S54931A
Authority
JP
Japan
Prior art keywords
failure
detection circuit
light quantity
conversion
photo
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.)
Pending
Application number
JP6644777A
Other languages
Japanese (ja)
Inventor
Takatomo Izume
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6644777A priority Critical patent/JPS54931A/en
Publication of JPS54931A publication Critical patent/JPS54931A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the conversion to electric signal in error, by performing troubleshooting earlier, through the direct ditection of the failure in the quantity of light of a photo electric conversion circuit for such as a paper tape reader from the photo detecting elements for information conversion and through informing it to the opeator or system.
COPYRIGHT: (C)1979,JPO&Japio
JP6644777A 1977-06-06 1977-06-06 Detection circuit of failure of light quantity Pending JPS54931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6644777A JPS54931A (en) 1977-06-06 1977-06-06 Detection circuit of failure of light quantity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6644777A JPS54931A (en) 1977-06-06 1977-06-06 Detection circuit of failure of light quantity

Publications (1)

Publication Number Publication Date
JPS54931A true JPS54931A (en) 1979-01-06

Family

ID=13316026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6644777A Pending JPS54931A (en) 1977-06-06 1977-06-06 Detection circuit of failure of light quantity

Country Status (1)

Country Link
JP (1) JPS54931A (en)

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