Method and apparatus for reducing power dissipation in DC termin

Details Method and apparatus for reducing power dissipation in DC termin Method and apparatus for reducing power dissipation in DC termin

1997-11-14

1999-06-15

Paladini, Albert W.

Electrical transmission or interconnection systems

Plural supply circuits or sources

One source floats across or compensates for other source

307 52, 379378, 379394, 379398, 379413, H02J 104

Patent

active

059125136

ABSTRACT:
A DC termination device particularly adapted for use in a device coupled to a two wire telecommunications system. The termination device controls the tip-to-ring current through the telecommunications device by means of a voltage controlled current source. The control voltage for the voltage controlled current source is provided by digital signal processing of the tip-to-ring voltage such that the tip-to-ring current is linearly proportional to the tip-to-ring voltage when the voltage is below a specified threshold level, but is maintained constant when the tip-to-ring voltage is over the threshold voltage. Preferably, the constant current is the minimum adequate current needed for operation.

REFERENCES:
patent: 3956638 (1976-05-01), Ahrens et al.
patent: 4318007 (1982-03-01), Rizzi
patent: 4482815 (1984-11-01), Orengo
patent: 5502634 (1996-03-01), Lavrisa
patent: 5555182 (1996-09-01), Galm

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