In-situ gain calibration of radio frequency devices using...

Details In-situ gain calibration of radio frequency devices using... In-situ gain calibration of radio frequency devices using...

2005-05-18

2008-11-04

Urban, Edward (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S127200, C455S226200, C455S240100, C455S341000, C375S345000

Reexamination Certificate

active

07447490

ABSTRACT:
An apparatus for calibrating gain of an radio frequency receiver (“Rx”) is disclosed to provide, among other things, a structure for performing in-situ gain calibration of an RF integrated circuit over time and/or over temperature without removing the RF integrated circuit from its operational configuration, especially when the gain of the RF integrated circuit is susceptible to variations in process, such as inherent with the CMOS process. In one embodiment, an exemplary apparatus includes a thermal noise generator configured to generate thermal noise as a calibrating signal into an input of an Rx path of an RF integrated circuit. The apparatus also includes a calibrator configured to first measure an output signal from an output of the Rx path, and then adjust a gain of the Rx path based on the thermal noise. In one embodiment, the thermal noise generator further includes a termination resistance and/or impedance.

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European Search Report dated Aug. 18, 2008 for EP Application No. 06010272.0, 6 pages.

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