Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2004-10-26
2008-11-18
Urban, Edward (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S115300, C455S226300, C455S250100, C375S346000
Reexamination Certificate
active
07454189
ABSTRACT:
Calibration of received signal strength indication (RSSI) within a radio frequency integrated circuit (RFIC) begins by concurrently enables a transmitter portion and receiver portion. With both the transmitter and receiver enabled, the RFIC provides a zero input to the transmitter portion, where the zero input is an effective zero input based on the input circuitry of the transmitter portion. The RFIC then measures, via the receiver portion, the received signal strength of the RF signal generated by the transmitter portion regarding the zero input signal. The RFIC then compares the measured received signal strength with a desired zero input signal strength value. If the measured received signal strength compares unfavorably with the desired zero input signal strength value (e.g., differ by more than a few percentage points), the received signal strength to power level table within the RFIC, which is used to convert a measured voltage into a dBm value, is scaled based on the difference between the measured received signal strength and the desired zero input signal strength value.
REFERENCES:
patent: 6560463 (2003-05-01), Santhoff
patent: 6915114 (2005-07-01), Khorram
patent: 7054603 (2006-05-01), Khorram
patent: 7151759 (2006-12-01), Ryan et al.
patent: 7299021 (2007-11-01), Parssinen et al.
patent: 2004/0198286 (2004-10-01), Khorram
Broadcom Corporation
Garlick & Harrison & Markison
Le Nhan T.
Markison Timothy W.
Urban Edward
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