COMMUNICATION SYSTEM BY USE OF LOW VOLTAGE POWER LINE IN CUSTOMER'S PREMISE

Title:

COMMUNICATION SYSTEM BY USE OF LOW VOLTAGE POWER LINE IN CUSTOMER'S PREMISE

Document Type and Number:

Japanese Patent JPH0746760

Kind Code:

A

Abstract:

PURPOSE: To provide a communication system by a low voltage power line in the customer's premise for surely transmitting information with a simple circuit structure.

CONSTITUTION: A switching control element 6 is connected in series in the transmitting side of a low voltage power line 2 of the commercial frequency in a customer's premise and the rise from zero potential of the fall of the commercial frequency voltage 3 of the low voltage power line 2 is delayed selectively for the predetermined electrical angle α with the switching control element 6 in order to form a cutout portion 4 of the voltage. The number of cutout portions and interval are determined corresponding to communication information and such communication information can be received by detecting the number of cutout portions and the interval in the receiving side.

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Inventors:

SHIMIZU OSAMU
SAKURAI SHOJI
KIMOTO TERUO

Application Number:

JP18959593A

Publication Date:

February 14, 1995

Filing Date:

July 30, 1993

Export Citation:

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Assignee:

OKURA DENKI CO LTD
KIMOTO TERUO

International Classes:

H02J3/00; H02J13/00; H04B3/54; H04Q9/00; (IPC1-7): H02J3/00; H02J13/00; H04B3/54; H04Q9/00

Domestic Patent References:

JPH04100499A	1992-04-02
JPS5445762A	1979-04-11
JPS4963888A	1974-06-20

Attorney, Agent or Firm:

Reijiro Ichihigashi

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