GB1528369A - Transmitting over power lines - Google Patents
Transmitting over power linesInfo
- Publication number
- GB1528369A GB1528369A GB51056/75A GB5105675A GB1528369A GB 1528369 A GB1528369 A GB 1528369A GB 51056/75 A GB51056/75 A GB 51056/75A GB 5105675 A GB5105675 A GB 5105675A GB 1528369 A GB1528369 A GB 1528369A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- capacitor
- transistors
- turned
- line
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5483—Systems for power line communications using coupling circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Dc Digital Transmission (AREA)
- Electronic Switches (AREA)
- Power Conversion In General (AREA)
- Rectifiers (AREA)
Abstract
1528369 Signalling over power lines AMERICAN SCIENCE & ENG Inc 12 Dec 1975 [20 Feb 1975] 51056/75 Heading H4R In an arrangement for signalling over power lines a unidirectional voltage is derived from the power line by rectifiers 501 and 502, and drive signals applied in antiphase to transistors 504 and 505 at a carrier frequency modulated by digital data to be transmitted. Switching on of transistor 504 causes capacitor 510 to charge and slowly switch on transistors 511 and 512 so that capacitor 528 is able to charge from the supply line 526, charging current flowing through resistor 527 turning on triac 529. When the carrier signal turns transistor 504 off transistors 511 and 512 are turned off as capacitor 510 discharges. Turning on of transistor 505 by the carrier signal on terminal 136' transistor 515 is turned on to allow capacitor 519 to charge up turning transistor 520 on slowly to connect line 525 to the power supply line 24<SP>1</SP> capacitor 528 is therefore discharged and the discharge current in resistor 527 again makes triac 529 conduct. Switching off of transistor 505 by the carrier signal allows transistor 520 to be turned off slowly as capacitor 519 discharges. Diodes 514 and 522 are provided to clip reverse voltage spikes produced by the inductance of the power line and its transformer when the transistors 512 or 520 are turned off. The voltage transitions of line 525 are coupled to the power supply line via capacitor 109.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55135675A | 1975-02-20 | 1975-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1528369A true GB1528369A (en) | 1978-10-11 |
Family
ID=24200933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB51056/75A Expired GB1528369A (en) | 1975-02-20 | 1975-12-12 | Transmitting over power lines |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS51101411A (en) |
| AR (1) | AR204804A1 (en) |
| BE (1) | BE836830A (en) |
| BR (1) | BR7601036A (en) |
| CA (1) | CA1052280A (en) |
| CH (1) | CH600709A5 (en) |
| DE (1) | DE2545344B2 (en) |
| ES (1) | ES441952A1 (en) |
| FR (1) | FR2301979A1 (en) |
| GB (1) | GB1528369A (en) |
| IL (1) | IL48210A (en) |
| IN (1) | IN143965B (en) |
| IT (1) | IT1052793B (en) |
| NL (1) | NL7601689A (en) |
| SE (1) | SE403421B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB662655A (en) * | 1949-02-04 | 1951-12-12 | Nl Standard Electric Maatsscha | Improvements in or relating to signalling systems employing d.c. impulses over and a.c. supply line |
| US3652876A (en) * | 1970-04-30 | 1972-03-28 | Quasar Microsystems Inc | Data transmission system, utilizing ac line frequency as clock |
| CH540607A (en) * | 1971-07-01 | 1973-08-15 | Zellweger Uster Ag | Method and device for signal generation and application of the method |
| JPS5326653B2 (en) * | 1973-06-14 | 1978-08-03 |
-
1975
- 1975-01-01 AR AR261387A patent/AR204804A1/en active
- 1975-09-30 IL IL48210A patent/IL48210A/en unknown
- 1975-10-09 DE DE19752545344 patent/DE2545344B2/en not_active Withdrawn
- 1975-10-21 ES ES441952A patent/ES441952A1/en not_active Expired
- 1975-11-06 CA CA239,097A patent/CA1052280A/en not_active Expired
- 1975-11-11 SE SE7512634A patent/SE403421B/en unknown
- 1975-11-11 IN IN2153/CAL/75A patent/IN143965B/en unknown
- 1975-12-10 IT IT52617/75A patent/IT1052793B/en active
- 1975-12-12 GB GB51056/75A patent/GB1528369A/en not_active Expired
- 1975-12-16 FR FR7538550A patent/FR2301979A1/en active Granted
- 1975-12-18 BE BE162904A patent/BE836830A/en unknown
- 1975-12-22 CH CH1662775A patent/CH600709A5/xx not_active IP Right Cessation
-
1976
- 1976-01-26 JP JP51007413A patent/JPS51101411A/en active Pending
- 1976-02-19 NL NL7601689A patent/NL7601689A/en not_active Application Discontinuation
- 1976-02-19 BR BR7601036A patent/BR7601036A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2545344A1 (en) | 1976-08-26 |
| FR2301979B1 (en) | 1978-05-12 |
| CA1052280A (en) | 1979-04-10 |
| AU8528575A (en) | 1977-04-07 |
| BE836830A (en) | 1976-06-18 |
| DE2545344B2 (en) | 1977-03-24 |
| JPS51101411A (en) | 1976-09-07 |
| CH600709A5 (en) | 1978-06-30 |
| NL7601689A (en) | 1976-08-24 |
| IL48210A0 (en) | 1975-11-25 |
| IN143965B (en) | 1978-03-04 |
| SE7512634L (en) | 1976-08-23 |
| AR204804A1 (en) | 1976-02-27 |
| ES441952A1 (en) | 1977-03-16 |
| IL48210A (en) | 1977-12-30 |
| IT1052793B (en) | 1981-07-20 |
| FR2301979A1 (en) | 1976-09-17 |
| SE403421B (en) | 1978-08-14 |
| BR7601036A (en) | 1976-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |