JPS5552024A - Light modulator control system - Google Patents
Light modulator control systemInfo
- Publication number
- JPS5552024A JPS5552024A JP12463478A JP12463478A JPS5552024A JP S5552024 A JPS5552024 A JP S5552024A JP 12463478 A JP12463478 A JP 12463478A JP 12463478 A JP12463478 A JP 12463478A JP S5552024 A JPS5552024 A JP S5552024A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- digital modulating
- carrier
- 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 perform modulation with an extremely simple circuit by analogically adding the digital modulating signal of a crest value 1/2 the output obtained by gating the carrier signal with the digital modulating signal by logic elements to said output.
CONSTITUTION: The carrier signal S2 and digital modulating signal S0 are inputted to a NAND circuit 10 through buffer amplifiers 8, 9 respectively. From the NAND circuit 10, the carrier signal S2 is outputted in an inverted state only in the period when the digital modulating signal S0 is high level, whereby the gate output signal S4 is obtained. This gate output signal S4 is applied to an output resistance 12 via resistor 11 and on the other hand, the digital modulating signal S0 is applied to an output resistor 12 via resistor 13 having the resistance value twice the resistor 11. Hence, the signal S4 is added to the digital modulating signal S5 having the crest value 1/2 the signal S4, whereby the modulating carrier signal S1 having been removed of the carrier components is obtained. In this way, the modulation may be accomplished with the extremely simple circuits.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12463478A JPS5552024A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12463478A JPS5552024A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552024A true JPS5552024A (en) | 1980-04-16 |
Family
ID=14890261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12463478A Pending JPS5552024A (en) | 1978-10-12 | 1978-10-12 | Light modulator control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552024A (en) |
-
1978
- 1978-10-12 JP JP12463478A patent/JPS5552024A/en active Pending
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