Title:
COMMUNICATION SYSTEM BY USE OF LOW VOLTAGE POWER LINE IN CUSTOMER'S PREMISE
Document Type and Number:
Japanese Patent JP2659165
Kind Code:
B2
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.
Inventors:
SHIMIZU OSAMU
SAKURAI SHOJI
KIMOTO TERUO
SAKURAI SHOJI
KIMOTO TERUO
Application Number:
JP18959593A
Publication Date:
September 30, 1997
Filing Date:
July 30, 1993
Export Citation:
Assignee:
OOKURA DENKI KK
KIMOTO TERUO
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:
| JPS5445762A | ||||
| JPH04100499A | ||||
| JPS4963888A |
Attorney, Agent or Firm:
市東 禮次郎