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AssigneeIntersil Americas Inc.
InventorsLeonel Ernesto Enriquez, Douglas Youngblood
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A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is coupled. A first current source supplies a first current derived via a low pass filter path from that flowing through the first current flow path to a second polarity input node of the tip amplifier, while a second current source supplies a similarly low pass filter path-derived second current to a second polarity input node of the ring amplifier. A voltage regulator is coupled with the first current flow path and is operative to regulate the voltage at the first polarity inputs of the tip and ring amplifiers to a regulated voltage value Vreg, so that the magnitudes of the first and second currents are based upon the regulated voltage value Vreg.
A method for limiting the DC voltage applied to a tip/ring amplifier of a subscriber line interface circuit (SLIC) comprising the steps of:
A circuit arrangement for limiting the DC voltage applied to a tip/ring amplifier of a subscriber line interface circuit (SLIC), having a first polarity input thereof coupled to a first current flow path to which a DC input voltage is coupled, said circuit arrangement comprising:
A circuit arrangement for limiting the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each having a first polarity input thereof coupled to a first current flow path to which a DC input voltage is coupled, said circuit arrangement comprising:
Dependencies are inferred from the claim text.