| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus for calibrating gain of an radio frequency receiver (Rx) to provide, among other things, a structure for performing in-situ gain calibration of an RF integrated circuit over long time and/or over wide 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. <P>SOLUTION: 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 resistor and/or impedance. <P>COPYRIGHT: (C)2007,JPO&INPIT |
