Method and apparatus for a single power supply for dual...

Details Method and apparatus for a single power supply for dual... Method and apparatus for a single power supply for dual...

2007-02-20

2007-02-20

Tran, Sinh (Department: 2615)

Telephonic communications

Subscriber line or transmission line interface

Power supply

C379S324000

Reexamination Certificate

active

10384296

ABSTRACT:
A method and apparatus is provided for using a single power supply in a dual mode fashion. A ringing signal is received. A waveform power supply signal based upon the ringing signal. An unbalanced output buffering function upon the signal to be conditioned using an unbalanced buffering circuit. Performing the unbalanced output buffering function includes switching between a plurality of power levels of the waveform power supply signal to maintain a predetermined maximum voltage across a plurality of devices relating to the unbalanced buffering circuit.

REFERENCES:
patent: 5535273 (1996-07-01), Kausel et al.
patent: 6690792 (2004-02-01), Robinson et al.

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