Because of the unique architecture of wireless receivers, a designer mustunderstand both the high frequency aspects as well as the low-frequency analogconsiderations for different building blocks of the receiver. The primary goal of thisresearch work is to explore techniques for implementing high performance RF andbaseband building blocks for wireless applications. Several novel techniques to improvethe performance of analog building blocks are presented. An enhanced technique tocouple two LC resonators is presented which does not degrade the loaded quality factorof the resonators which results in an increased dynamic range.A novel technique to automatically tune the quality factor of LC resonators ispresented. The proposed scheme is stable and fast and allows programming both thequality factor and amplitude response of the LC filter.To keep the oscillation amplitude of LC VCOs constant and thus achieving aminimum phase noise and a reliable startup, a stable amplitude control loop is presented.The proposed scheme has been also used in a master-slave quality factor tuning of LCfilters.An efficient and low-cost architecture for a 3.1GHz-10.6GHz ultra-wide bandfrequency synthesizer is presented. The proposed scheme is capable of generating 14A novel pseudo-differential transconductance amplifier is presented. Theproposed scheme takes advantage of the second-order harmonic available at the outputcurrent of pseudo-differential structure to cancel the third-order harmonic distortion.A novel nonlinear function is proposed which inherently removes the third andthe fifth order harmonics at its output signal. The proposed nonlinear block is used in abandpass-based oscillator to generate a highly linear sinusoidal output.Finally, a linearized BiCMOS transconductance amplifier is presented. Thistransconductance is used to build a third-order linear phase low pass filter with a cut-offfrequency of 264MHz for an ultra-wide band receiver.carrier frequencies.
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