Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Reexamination Certificate
2011-08-02
2011-08-02
Fureman, Jared J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
Reexamination Certificate
active
07990675
ABSTRACT:
Methods and apparatus for utilizing a solid state relay arrangement as a part of a protection scheme for a telecom wireline card suitable are disclosed. According to one embodiment, a line card that is suitable for use in an optical network device includes an electrical port, a plurality of input lines, an output line, and protection circuitry. The protection circuitry switches or multiplexes the plurality of input lines into the output line, and includes a solid state relay arrangement and power isolation circuitry. The power isolation circuitry provides a high impedance to power rails associated with the solid state relay arrangement, and the solid state relay arrangement includes at least one N-channel field effect transistor (FET), at least one protection diode, and at least one charge pump.
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Lee Kwok
Robinson Michael L.
Cisco Technology Inc.
Edell Shapiro & Finnan LLC
Fureman Jared J
Hoang Ann T
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