JPS5552023A - Light modulator control system - Google Patents
Light modulator control systemInfo
- Publication number
- JPS5552023A JPS5552023A JP12463378A JP12463378A JPS5552023A JP S5552023 A JPS5552023 A JP S5552023A JP 12463378 A JP12463378 A JP 12463378A JP 12463378 A JP12463378 A JP 12463378A JP S5552023 A JPS5552023 A JP S5552023A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- circuit
- digital modulating
- carrier signal
- 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 perform light modulation of high quality by providing a variable delay circuit, etc. and maintaining the modulated light beam always at a fixed state even if the carrier signal and digital modulating signal are not in the special synchronizing relation.
CONSTITUTION: The signal S2 from a carrier signal generator 8 is phase adjusted by a phase adjusting circuit 9 and is inputted to an amplitude modulating circuit 10. The digital modulating signal S2' is being inputted via delay circuit 11 to the amplitude modulating circuit 10, hence the carrier signal S2 is amplitude-modulated by the digital modulating signal S2'. The output signal S3 of a phase difference detecting circuit 13 is applied to a variable delay circuit 12, by which the carrier signal S2' whose phase becomes always the specified phase at each rise point of the digital modulating signal S0. Hence, the phases of the carrier signal at each rise point of the digital modulating signal S0 and digital modulating signal S0' become always the same phase. In this way, light modulation of high quality may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12463378A JPS5552023A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12463378A JPS5552023A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552023A true JPS5552023A (en) | 1980-04-16 |
Family
ID=14890237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12463378A Pending JPS5552023A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552023A (en) |
-
1978
- 1978-10-12 JP JP12463378A patent/JPS5552023A/en active Pending
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