Telecommunications – Receiver or analog modulated signal frequency converter – With protection circuit for receiver circuit
Reexamination Certificate
2007-05-29
2007-05-29
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With protection circuit for receiver circuit
C455S333000, C455S296000, C257S355000, C257S288000
Reexamination Certificate
active
10284645
ABSTRACT:
An integrated circuit comprises an ESD protection circuit including an inductor coupled between an input terminal and a ground terminal at which an RF signal is applied. The inductor is designed so as to provide a sufficient current capability required in typical ESD events. Moreover, the inductance of the inductor is selected to define, in combination with any parasitic capacitance present, a resonance tank with a resonant frequency that is matched to the RF signal. Accordingly, the operating frequency of the integrated circuit is not limited by the ESD protection circuit. In a further embodiment, an output terminal is ESD protected by an inductor that is coupled to an auxiliary voltage serving to bias an output transistor. Moreover, clamping elements, such as diodes, are provided between the auxiliary voltage and the supply voltage and between the auxiliary voltage and ground potential.
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“Elektronik, Frundlagen, Prinzipien, Zusammenhange”, Horst Volz, 2ndedition, 1979, Akademie-Verlag, Berlin.
Hahn Uwe
Huschka Andreas
Kluge Wolfram
Advanced Micro Devices , Inc.
Chow Charles
Kivlin B. Noäl
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Urban Edward F.
LandOfFree
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