JPS5518171A - Carrier wave reproducing device - Google Patents
Carrier wave reproducing deviceInfo
- Publication number
- JPS5518171A JPS5518171A JP9181178A JP9181178A JPS5518171A JP S5518171 A JPS5518171 A JP S5518171A JP 9181178 A JP9181178 A JP 9181178A JP 9181178 A JP9181178 A JP 9181178A JP S5518171 A JPS5518171 A JP S5518171A
- Authority
- JP
- Japan
- Prior art keywords
- carrier wave
- oscillator
- carry
- divider
- reproduction
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
- H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
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 prevent the false lead-in and to secure the reproduction of the correct carrier wave by starting the divider to sweep the oscillation frequency of the voltage control oscillator when the differential frequency obtained through mixture exceeds the fixed level. CONSTITUTION:Part of the oscillation output of voltage control oscillator 6 is mixed 8 with the output of reference oscillator 9, and the differential frequency component is drawn out to be applied to counter 21 for counting of the frequency in a fixed cycle. Counter 21 generates the carry signal when the count value exceeds a fixed number, and the carry singnal is divided by divider 22. This division signal sweeps the control voltage of oscillator 6. Thus the false lead-in, if occurs, can be detected immediately to carry out sweeping in order to secure the reproduction of the correct carrier wave.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9181178A JPS5518171A (en) | 1978-07-27 | 1978-07-27 | Carrier wave reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9181178A JPS5518171A (en) | 1978-07-27 | 1978-07-27 | Carrier wave reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5518171A true JPS5518171A (en) | 1980-02-08 |
JPS5759975B2 JPS5759975B2 (en) | 1982-12-17 |
Family
ID=14037004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9181178A Granted JPS5518171A (en) | 1978-07-27 | 1978-07-27 | Carrier wave reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5518171A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4450977A (en) * | 1981-04-02 | 1984-05-29 | The Dow Chemical Company | Manufacture of draw-redraw cans using film laminated or extrusion coated steel sheet material |
US4452375A (en) * | 1981-04-02 | 1984-06-05 | The Dow Chemical Company | Manufacture of draw-redraw cans using steel sheet material film laminated or extrusion coated with a high density polyethylene graft copolymer |
US4452374A (en) * | 1981-04-02 | 1984-06-05 | The Dow Chemical Company | Manufacture of draw-redraw cans using an irradiated film laminated or extrusion coated steel sheet material |
JPH0335824A (en) * | 1989-07-03 | 1991-02-15 | Nippon Steel Corp | Method for deep drawing titanium sheet |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0285610A (en) * | 1988-09-22 | 1990-03-27 | Matsushita Electric Ind Co Ltd | Continuous discharge igniter |
-
1978
- 1978-07-27 JP JP9181178A patent/JPS5518171A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4450977A (en) * | 1981-04-02 | 1984-05-29 | The Dow Chemical Company | Manufacture of draw-redraw cans using film laminated or extrusion coated steel sheet material |
US4452375A (en) * | 1981-04-02 | 1984-06-05 | The Dow Chemical Company | Manufacture of draw-redraw cans using steel sheet material film laminated or extrusion coated with a high density polyethylene graft copolymer |
US4452374A (en) * | 1981-04-02 | 1984-06-05 | The Dow Chemical Company | Manufacture of draw-redraw cans using an irradiated film laminated or extrusion coated steel sheet material |
JPH0335824A (en) * | 1989-07-03 | 1991-02-15 | Nippon Steel Corp | Method for deep drawing titanium sheet |
Also Published As
Publication number | Publication date |
---|---|
JPS5759975B2 (en) | 1982-12-17 |
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