Telephonic communications – Subscriber line or transmission line interface – Power supply
Reexamination Certificate
2011-06-28
2011-06-28
Jamal, Alexander (Department: 2614)
Telephonic communications
Subscriber line or transmission line interface
Power supply
Reexamination Certificate
active
07970125
ABSTRACT:
In one embodiment, the present invention includes an operational amplifier having a first input to receive a first current formed of an input current and an offset current. A first MOSFET device having a gate terminal may be coupled to an output of the operational amplifier. An output stack including one or more cascoded devices to provide an output current corresponding to a gain of the operational amplifier may be coupled to a first terminal of the first MOSFET device. The operational amplifier may be used in various circuitry, such as a subscriber line interface circuit (SLIC).
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Apfel Russell J.
Webb Richard B.
Jamal Alexander
Silicon Laboratories Inc.
Trop Pruner & Hu P.C.
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