JPS6420779A - Video switching device controller - Google Patents
Video switching device controllerInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6180305B1 (en) | 2000-02-16 | 2001-01-30 | Imation Corp. | Organic photoreceptors for liquid electrophotography |
-
1987
- 1987-07-15 JP JP17765687A patent/JPS6420779A/en active Pending
Cited By (1)
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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