JPS55133162A - Modulation unit - Google Patents
Modulation unitInfo
- Publication number
- JPS55133162A JPS55133162A JP4056979A JP4056979A JPS55133162A JP S55133162 A JPS55133162 A JP S55133162A JP 4056979 A JP4056979 A JP 4056979A JP 4056979 A JP4056979 A JP 4056979A JP S55133162 A JPS55133162 A JP S55133162A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- carrier
- leakage
- low level
- diode
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To enable to reproduce the logic signal delivered without error even with envelope detection, by decreasing the leakage signal level of carrier when the logic signal is at low level. CONSTITUTION:When the unidirectional Return Zero (RZ) signal of the modulation signal is at low level, that is, when the terminal 16 is selected to the terminal 15 of the selector switch, the operation of the amplifier 2 is interrupted with the inversion of the switch 3. In this case, the diode 5 is nonconductive and the diode 9 is conductive, bypassing the leakage signal of carrier to ground with the bypass capacitor 7. With bypass of the carrier leakage signal to ground, the leakage of carrier at the low level of unidirectional flow RZ signal can be suppressed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4056979A JPS55133162A (en) | 1979-04-04 | 1979-04-04 | Modulation unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4056979A JPS55133162A (en) | 1979-04-04 | 1979-04-04 | Modulation unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55133162A true JPS55133162A (en) | 1980-10-16 |
Family
ID=12584097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4056979A Pending JPS55133162A (en) | 1979-04-04 | 1979-04-04 | Modulation unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55133162A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58219843A (en) * | 1982-06-14 | 1983-12-21 | Nec Corp | Signal transmitter |
-
1979
- 1979-04-04 JP JP4056979A patent/JPS55133162A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58219843A (en) * | 1982-06-14 | 1983-12-21 | Nec Corp | Signal transmitter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8306835A1 (en) | A signal detection circuit with self-adjusting threshold having modulated carrier input. | |
JPS5373340A (en) | Abnormal voltage detection circuit | |
DE3480153D1 (en) | Carrier detection circuit | |
JPS55133162A (en) | Modulation unit | |
ES8401645A1 (en) | Current-discrimination arangement. | |
JPS5544222A (en) | Modulation system | |
JPS5328383A (en) | Charge t ransfer device | |
JPS57201308A (en) | Frequency demodulating circuit | |
JPS5244145A (en) | Amplifier circuit | |
JPS527661A (en) | Fm/am conversion circuit | |
JPS5299058A (en) | Fm signal demodulating circuit | |
JPS52157A (en) | Instantaneous frequency displacement control circuit | |
JPS57103429A (en) | Deltam modulator and demodulator | |
JPS5531360A (en) | Demodulator circuit | |
JPS5359351A (en) | Fm demodulating circuit | |
JPS5753140A (en) | Amplifying circuit | |
JPS5687210A (en) | Digital demodulating circuit | |
JPS52109852A (en) | Demodulating circuit | |
JPS5780830A (en) | Logical gate circuit | |
JPS57141131A (en) | Logical circuit | |
JPS52135619A (en) | Input unit | |
JPS55145463A (en) | Tank circuit | |
JPS5375724A (en) | Afc unit | |
JPS5372560A (en) | Binary coded circuit | |
JPS5413289A (en) | Radar unit |