Method for customizing operation of a battery feed circuit in a

Details Method for customizing operation of a battery feed circuit in a Method for customizing operation of a battery feed circuit in a

1996-06-27

1998-05-19

Zele, Krista

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379399, 379324, H04M 1900

Patent

active

057546444

ABSTRACT:
A method for controlling power losses associated with the operation of line interface circuits in telecommunications networks comprises detecting a loop current of at least one subscriber loop interconnected to at least one line interface circuit. The detected loop current is used to access a threshold voltage value from a line interface circuit database. A threshold voltage based on the threshold voltage value retrieved from the database is compared to a feedback voltage to control a duty cycle of a switching converter circuit in the line interface circuit. Controlling the duty cycle of the switching converter circuit enables control of battery voltages based on the comparison of the threshold voltage and the feedback voltage. In the preferred embodiment, the battery voltage is controlled to be a minimum voltage needed to provide a predetermined magnitude of the minimum loop current.

REFERENCES:
patent: 4490580 (1984-12-01), Nagashima
patent: 4511763 (1985-04-01), Skidanenko et al.
patent: 4652701 (1987-03-01), Cubbison, Jr.
patent: 5596637 (1997-01-01), Pasetti et al.
patent: 5636273 (1997-06-01), Schopfer et al.
patent: 5640451 (1997-06-01), Schopfer

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