JPS5680029A - Photo analog-digital conversion circuit - Google Patents
Photo analog-digital conversion circuitInfo
- Publication number
- JPS5680029A JPS5680029A JP15768879A JP15768879A JPS5680029A JP S5680029 A JPS5680029 A JP S5680029A JP 15768879 A JP15768879 A JP 15768879A JP 15768879 A JP15768879 A JP 15768879A JP S5680029 A JPS5680029 A JP S5680029A
- Authority
- JP
- Japan
- Prior art keywords
- output
- photoswitch
- component
- laser
- conversion circuit
- 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
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To realize a photo A-D conversion circuit which does not require photoelectro and electrophoto conversion by using a semiconductor laser using a self- coupling effect as a photosensor, and combining this with a directional coupler type light modulator and photoswitches.
CONSTITUTION: The 1st photoswitch 14 is provided in contact with one end face of the output of a semiconductor laser 11, and the one output 15 thereof is approached to the physical quantity of changing reflectance so that the reflected light does not return to the other output 17, whereby the output of the laser 11 is made to the AC component coinciding with the change-over frequency of the 1st photoswitch 14. The 2nd photoswitch 18 provided to the other output end face of the laser 11 branches the DC component and AC component of the laser output. The 3rd photoswitch 20 and the 4th photoswitch 19 are connected to the two output ends, respectively, and the 2nd photoswitch 18, and the comparison of the AC component light signal and threshold value level is accomplished successively.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15768879A JPS5680029A (en) | 1979-12-05 | 1979-12-05 | Photo analog-digital conversion circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15768879A JPS5680029A (en) | 1979-12-05 | 1979-12-05 | Photo analog-digital conversion circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5680029A true JPS5680029A (en) | 1981-07-01 |
Family
ID=15655206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15768879A Pending JPS5680029A (en) | 1979-12-05 | 1979-12-05 | Photo analog-digital conversion circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680029A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59137642U (en) * | 1983-03-07 | 1984-09-13 | 日本電気株式会社 | Analog-to-digital converter |
US5010346A (en) * | 1989-10-27 | 1991-04-23 | The Boeing Company | Electro-optical analog-to-digital converter and method for digitizing an analog signal |
-
1979
- 1979-12-05 JP JP15768879A patent/JPS5680029A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59137642U (en) * | 1983-03-07 | 1984-09-13 | 日本電気株式会社 | Analog-to-digital converter |
US5010346A (en) * | 1989-10-27 | 1991-04-23 | The Boeing Company | Electro-optical analog-to-digital converter and method for digitizing an analog signal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3670740D1 (en) | CIRCUIT FOR CONVERTING A DIFFERENTIAL INPUT SIGNAL INTO THE LEVEL OF THE CMOS LOGIC. | |
JPS544560A (en) | Semiconductor inverter circuit | |
JPS5680029A (en) | Photo analog-digital conversion circuit | |
DE69112866D1 (en) | MOS to ECL output buffer circuit with a single output. | |
JPS5341729A (en) | Inverter | |
DE3784641D1 (en) | DIGITAL 2 OF 3 SELECTION AND OUTPUT SWITCHING. | |
JPS5257792A (en) | Photoelectric converting element | |
JPS5578673A (en) | Facsimile transmitter | |
JPS5299723A (en) | Circuit for converting analogous signals to binary value signals | |
JPS5415686A (en) | Photoelectric converting device | |
JPS54153584A (en) | High speed photo coupler | |
JPS56117423A (en) | Binary coding circuit by multistage threshold level | |
JPS5250184A (en) | Photo coupler | |
JPS5438146A (en) | Photo switch | |
JPS5294089A (en) | Optically coupled semi-conductor element | |
JPS529386A (en) | Photocoupling element | |
JPS5236426A (en) | Optical character readout device | |
JPS533767A (en) | Input-output-insulation circuit using photocoupler | |
JPS56138333A (en) | Optoelectronic switch | |
JPS5591861A (en) | Cmos logic circuit | |
JPS53135586A (en) | Photo coupling semiconductor device | |
JPS52152771A (en) | Oscilloscope | |
JPS54118185A (en) | Multi-wavelength band luminous element | |
JPS5368147A (en) | De-emphasis circuit | |
JPS52131488A (en) | High-performance photoelectric conversion |