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The performance of the quadrature receivers are degraded due to the gain and phase mismatch in I and Q channels. In this paper we develop a mixed-mode technique for self calibration in quadrature receivers. A novel mismatch measurement and estimation scheme using an RF amplitude detector and the IC's digital core is shown. Then, digital and digitally-assisted analog correction is employed to remove...
Robustness and yield enhancement techniques for RF circuits and systems are gaining accelerating traction due to increased PVT variability in nanometer CMOS. One of the more viable approaches that make use of the increasingly heterogeneous systems is digitally-assisted RF, enabling circuit programmability and flexibility. With the inclusion of the more robust digital, RF circuits' impairments may...
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