Telephone set comprising a line voltage stabilizer having a DC s

Details Telephone set comprising a line voltage stabilizer having a DC s Telephone set comprising a line voltage stabilizer having a DC s

1987-05-29

1989-03-07

Ng, Jin F.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379413, H04M 100, H04M 1908

Patent

active

048113913

ABSTRACT:
A telephone set comprising an active line voltage stabilizer circuit having two output terminals 10-1 and 10-2 between which it produces a stabilized direct voltage which is independent of the line current. A series arrangement of a capacitor (14) and a resistor (16) is connected between such output terminals, the junction thereof constituting a DC supply terminal for the telephone set. Such arrangement does not alter the a.c. impedance of the stabilizer circuit between the wires, and has a considerably lower d.c. output resistance than supply terminals previously employed.

REFERENCES:
patent: 4341991 (1982-07-01), Geboers et al.
patent: 4388498 (1983-06-01), Geboers et al.
patent: 4626626 (1986-12-01), Coulmance
patent: 4639551 (1987-01-01), Kaire
patent: 4680789 (1987-07-01), Sijbers et al.

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