Title:
CONNECTING SYSTEM FOR TELEPHONE DEVICE
Document Type and Number:
Japanese Patent JPS579157
Kind Code:
A
Abstract:
PURPOSE: To simplify the constitution of a device by separating a channel signal, control information signal and power supply current each other through the use of a transformer.
CONSTITUTION: The channel signal passing through the primary winding of a transformer 11 and supplied from a line 1 is supplied to a channel circuit 3 via an LPF consisting of the inductance of the primary winding. A control information signal is supplied to a control circuit 7 via the transformer 11. Further, this power supply current is given to a power supply circuit 9 via the primary winding.
Inventors:
MORIKAMI EIJI
OOBA TAKEO
SHINTANI HIROZOU
OOBA TAKEO
SHINTANI HIROZOU
Application Number:
JP8273980A
Publication Date:
January 18, 1982
Filing Date:
June 20, 1980
Export Citation:
Assignee:
IWATSU ELECTRIC CO LTD
International Classes:
H04Q3/58; H04Q5/00; H04Q5/02; (IPC1-7): H04M1/72; H04Q3/58
Next Patent: RELAY EXCHANGE TEST SYSTEM