A novel self-healing methodology for RF Amplifier circuits based on oscillation principles

This paper proposes a novel self-healing methodology for embedded RF Amplifiers (LNAs) in RF sub-systems. The proposed methodology is based on oscillation principles in which the Device-under-Test (DUT) itself generates the output test signature with the help of additional circuitry. The self-generated test signature from the DUT is analyzed by using onchip resources for testing the LNA and controlling its calibration knobs to compensate for multi-parameter variations in the LNA manufacturing process. Thus, the proposed methodology enables self-test and self-calibration of RF circuits without the need for external test stimulus. The proposed methodology is demonstrated through simulations as well as measurements performed on a RF LNA.