JPS554621A - Digital input circuit - Google Patents

Digital input circuit

Info

Publication number
JPS554621A
JPS554621A JP7700178A JP7700178A JPS554621A JP S554621 A JPS554621 A JP S554621A JP 7700178 A JP7700178 A JP 7700178A JP 7700178 A JP7700178 A JP 7700178A JP S554621 A JPS554621 A JP S554621A
Authority
JP
Japan
Prior art keywords
digital input
diode
series
input circuit
resistance
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
JP7700178A
Other languages
Japanese (ja)
Inventor
Hiroshi Tanaka
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 JP7700178A priority Critical patent/JPS554621A/en
Publication of JPS554621A publication Critical patent/JPS554621A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To obtain an economical digital input circuit by making connections so that a power voltage will be applied in parallel to a diode by providing a resistance connected in series.
CONSTITUTION: In order to flow an input current to photo coupler 5, the main circuit is provided which has diode 14, power supply 2, contact 1, and current limiting resistance 4 connected sequentially in series from one input terminal to the other. Then, auxiliary power supply circuit 12 with series-connected resistance 13 is so connected that power voltage 2 will be applied to diode 14 in parallel. Consequently, an economical digital input circuit with small power consumption can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP7700178A 1978-06-27 1978-06-27 Digital input circuit Pending JPS554621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7700178A JPS554621A (en) 1978-06-27 1978-06-27 Digital input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7700178A JPS554621A (en) 1978-06-27 1978-06-27 Digital input circuit

Publications (1)

Publication Number Publication Date
JPS554621A true JPS554621A (en) 1980-01-14

Family

ID=13621523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7700178A Pending JPS554621A (en) 1978-06-27 1978-06-27 Digital input circuit

Country Status (1)

Country Link
JP (1) JPS554621A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177396A (en) * 1984-09-25 1986-04-19 株式会社東芝 Electronic-part taping

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177396A (en) * 1984-09-25 1986-04-19 株式会社東芝 Electronic-part taping

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