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EP0111604A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Transmitter/receiver circuit pair for signal transmission over power wiring

Assignee: Sharp Corp
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Filing: 1982-12-17
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Granted: —
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Expires: 2002-12-17
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Abstract

Abstract Disclosed is a system of transmitting and receiving control signals for various types of indoor devices using the existing power wiring in houses and buildings. The transmitter section of the power wiring transmission system is provided with a circuit in which the output of a sine wave oscillator (1) is fed to an emitter-follower (5. 6) through a photocoupler (2) and this output is then fed to the indoor power distribution line through a series resonance circuit (8, 9) after stepping down with a transformer (8); the receiving section is provided with a circuit in which the signal from the distribution line is fed to a parallel resonance circuit after passing through a series resonance circuit. Moreover, the input and output sections of the receiver are resistor terminated.

Inventors

  • 👤 Masahiro Ise
  • 👤 Katsuyuki Machino
  • 👤 Hidehiko Tanaka
  • 👤 Toshiyuki Matsubara

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 20:11
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B2203/00; H04B2203/54; H04B2203/5404; H04B2203/5425; H04B2203/5429; H04B2203/5458; H04B2203/5462; H04B2203/5483; H04B2203/5491

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 95 words
A transmitter/receiver circuit for power wiring transmission characterized in that the transmitting section comprises a circuit in which the output of a sine wave oscillator is fed to an emitter-follower through a photocoupler and this output is then fed to the indoor distribution line through a series resonance circuit after passing through a step-down transformer; and that the receiving section comprises a circuit in which the signal from the distribution line is fed to a parallel resonance circuit after passing through a series resonance circuit and that the input and output sections are resistor terminated.
Claim 2
Dependent Claim 95 words
A transmitter/receiver circuit for power wiring transmission characterized in that the transmitting section comprises a circuit in which the output of a sine wave oscillator is fed to an emitter-follower through a photocoupler and this output is then fed to the indoor distribution line through a series resonance circuit after passing through a step-down transformer; and that the receiving section comprises a circuit in which the signal from the distribution line is fed to a parallel resonance circuit after passing through a series resonance circuit and that the input and output sections are resistor terminated.
Claim 3
Dependent Claim 35 words
A circuit for transmitting signals over power supply wiring, wherein the signals are selectively coupled to the wiring via a photosensor of a photocoupler by successively switching on and off a photoemitter of the photocoupler.
Claim 4
Dependent Claim 35 words
A circuit for transmitting signals over power supply wiring, wherein the signals are selectively coupled to the wiring via a photosensor of a photocoupler by successively switching on and off a photoemitter of the photocoupler.

References Cited (Backward Citations)

US2282968A Cited
FR1418591A Cited
US3909821A Cited
DE2358003A1 Cited

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