Telecommunications – Receiver or analog modulated signal frequency converter – With protection circuit for receiver circuit
Reexamination Certificate
2007-04-03
2007-04-03
Maung, Nay (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With protection circuit for receiver circuit
C455S226100, C455S230000, C455S269000, C455S272000, C455S334000
Reexamination Certificate
active
10681604
ABSTRACT:
An antenna detection and diagnostic system and associated method, including current and voltage detection circuits, are disclosed for detecting antenna failure mechanisms for integrated radio receivers. Integrated current limit detection circuitry is disclosed that determines current levels drawn by a remotely mounted antenna and generates a drive signal that controls a current limiting pass transistor such that current flow through the transistor is reduced when the detected current level drawn antenna rises above a current limit level. Integrated current and voltage detection circuitry is disclosed that detects current and voltage levels drawn by a remotely mounted antenna and determines under-current, over-current, and over-voltage antenna error conditions. At least one antenna error output pin for the integrated radio receiver is then used provide an output signal indicative of antenna error conditions.
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International Search Report; PCT/US2004/030218; Jan. 25, 2005; 11 pgs.
Chan Richard
Maung Nay
O'Keefe, Egan Peterman & Enders LLP
Silicon Laboratories Inc.
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