JPS54133060A - Digital-analog conversion circuit using photo coupling element - Google Patents
Digital-analog conversion circuit using photo coupling elementInfo
- Publication number
- JPS54133060A JPS54133060A JP4098878A JP4098878A JPS54133060A JP S54133060 A JPS54133060 A JP S54133060A JP 4098878 A JP4098878 A JP 4098878A JP 4098878 A JP4098878 A JP 4098878A JP S54133060 A JPS54133060 A JP S54133060A
- Authority
- JP
- Japan
- Prior art keywords
- light
- decoder
- conversion circuit
- data
- resistor
- 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
Abstract
PURPOSE: To make easy the design of the conversion circuit and the selection of the components, by illuminating the light having the light amount corresponding to each terminal of the decoder interpreting binary digital electric signal and converting it into the analog electric signal corresponding to the light.
CONSTITUTION: The output of the decoder 2 interpreting the binary digital signal is weighted to the upper rank by one with the two input OR gate 3, connected to the anode of the light emitting diode 3 via the resistor 4, and the cathode is grounded and a given current flows to the diode 5 to cause light emission. Further, the light, that is, weighted light emission of the decoder 2 is obtained. To each collector terminal of the photo detection transistor in pair to it, the collector current corresponding to the number of light emitting diodes emitted by the number depending on the weight of the data 1, flows, and the analog data 8 corresponding to the weight of the data 1 is outputted across the resistor 7.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4098878A JPS54133060A (en) | 1978-04-06 | 1978-04-06 | Digital-analog conversion circuit using photo coupling element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4098878A JPS54133060A (en) | 1978-04-06 | 1978-04-06 | Digital-analog conversion circuit using photo coupling element |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54133060A true JPS54133060A (en) | 1979-10-16 |
Family
ID=12595797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4098878A Pending JPS54133060A (en) | 1978-04-06 | 1978-04-06 | Digital-analog conversion circuit using photo coupling element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54133060A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3641564A (en) * | 1966-06-23 | 1972-02-08 | Stromberg Carlson Corp | Digital-to-analog and analog-to-digital signal translation with optical devices |
-
1978
- 1978-04-06 JP JP4098878A patent/JPS54133060A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3641564A (en) * | 1966-06-23 | 1972-02-08 | Stromberg Carlson Corp | Digital-to-analog and analog-to-digital signal translation with optical devices |
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