JPS6420779A - Video switching device controller - Google Patents

Video switching device controller

Info

Publication number
JPS6420779A
JPS6420779A JP17765687A JP17765687A JPS6420779A JP S6420779 A JPS6420779 A JP S6420779A JP 17765687 A JP17765687 A JP 17765687A JP 17765687 A JP17765687 A JP 17765687A JP S6420779 A JPS6420779 A JP S6420779A
Authority
JP
Japan
Prior art keywords
converter
change
output
over switch
operated
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
JP17765687A
Other languages
Japanese (ja)
Inventor
Takeo Emori
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP17765687A priority Critical patent/JPS6420779A/en
Publication of JPS6420779A publication Critical patent/JPS6420779A/en
Pending legal-status Critical Current

Links

Landscapes

  • Studio Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To send out a control signal for a video switching device with a small quantity of a connection wire by using a D/A converter and an A/D converter. CONSTITUTION:The titled controller is provided with first partial pressure circuits R11-R17 to output the step voltage of step numbers set beforehand corresponding to an operated change-over switch through the operated change- over switch, an A/D converter 40, a D/A converter 50 and second partial pressure circuits R21-R27 to output respective reference voltages of a voltage same as respective analog outputs outputted from the D/A converter 50 through the A/D converter 40 corresponding to each operated change-over switch when plural change-over switches are respectively operated, and when the output of the D/A converter 50 and each reference voltage of the second partial pressure circuits are respectively compared, they are coincident, coincidence circuits 301-307 to drive the indicator of the change-over switch to output the step voltage corresponding to the output of the D/A converter 50. Thus, one connection wire is sufficient even when the step voltage is outputted to the A/D converter through the change-over switch and even when the analog output is outputted to the coincidence circuits from the D/A change-over switch.
JP17765687A 1987-07-15 1987-07-15 Video switching device controller Pending JPS6420779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17765687A JPS6420779A (en) 1987-07-15 1987-07-15 Video switching device controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17765687A JPS6420779A (en) 1987-07-15 1987-07-15 Video switching device controller

Publications (1)

Publication Number Publication Date
JPS6420779A true JPS6420779A (en) 1989-01-24

Family

ID=16034802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17765687A Pending JPS6420779A (en) 1987-07-15 1987-07-15 Video switching device controller

Country Status (1)

Country Link
JP (1) JPS6420779A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180305B1 (en) 2000-02-16 2001-01-30 Imation Corp. Organic photoreceptors for liquid electrophotography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180305B1 (en) 2000-02-16 2001-01-30 Imation Corp. Organic photoreceptors for liquid electrophotography

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