GB2242809A - Modulation device. - Google Patents

Modulation device.

Info

Publication number
GB2242809A
GB2242809A GB9110893A GB9110893A GB2242809A GB 2242809 A GB2242809 A GB 2242809A GB 9110893 A GB9110893 A GB 9110893A GB 9110893 A GB9110893 A GB 9110893A GB 2242809 A GB2242809 A GB 2242809A
Authority
GB
United Kingdom
Prior art keywords
gate
modulation device
terminal
logic signal
output
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.)
Withdrawn
Application number
GB9110893A
Other versions
GB9110893D0 (en
Inventor
John Allen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
M NET Ltd
Original Assignee
M NET Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by M NET Ltd filed Critical M NET Ltd
Publication of GB9110893D0 publication Critical patent/GB9110893D0/en
Publication of GB2242809A publication Critical patent/GB2242809A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • 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
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplitude Modulation (AREA)

Abstract

A modulation device employs a tristate gate (2) as a modulator for transmitting a logic signal to a terminal N connected to a mains voltage neutral line. A carrier frequency signal is connected to the input of the gate and an isolating capacitor C8 is connected between the output of the tristate gate and the output terminal N. The gate is enabled by application of the logic signal to its enable terminal.
GB9110893A 1988-11-22 1991-05-20 Modulation device. Withdrawn GB2242809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888827210A GB8827210D0 (en) 1988-11-22 1988-11-22 Modulation device

Publications (2)

Publication Number Publication Date
GB9110893D0 GB9110893D0 (en) 1991-07-10
GB2242809A true GB2242809A (en) 1991-10-09

Family

ID=10647221

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888827210A Pending GB8827210D0 (en) 1988-11-22 1988-11-22 Modulation device
GB9110893A Withdrawn GB2242809A (en) 1988-11-22 1991-05-20 Modulation device.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888827210A Pending GB8827210D0 (en) 1988-11-22 1988-11-22 Modulation device

Country Status (2)

Country Link
GB (2) GB8827210D0 (en)
WO (1) WO1990006023A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022262A (en) * 1983-07-15 1985-02-04 Hitachi Ltd Bus control method
JPS60189356A (en) * 1984-03-08 1985-09-26 Nec Corp Amplitude modulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622262A (en) * 1992-06-30 1994-01-28 Canon Inc Recorder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022262A (en) * 1983-07-15 1985-02-04 Hitachi Ltd Bus control method
JPS60189356A (en) * 1984-03-08 1985-09-26 Nec Corp Amplitude modulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electronic Design, vol.34, no.23, October 1986, D.I. Haritonet al, pages 114-124,see page 118. *

Also Published As

Publication number Publication date
GB8827210D0 (en) 1988-12-29
WO1990006023A1 (en) 1990-05-31
GB9110893D0 (en) 1991-07-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)