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A 0.9GHz-to-5.8GHz SDR RFE is presented employing a dual-band LNA with a switchable 3-coil transformer as loading for current-gain boosting and an automatic LO phase-error detection and calibration circuitry for harmonic rejection. Fabricated in 65nm CMOS and integrated with a fully-integrated all-digital synthesizer (ADFS), the RFE measures NF between 2.9dB and 3.8dB, IIP3 between −1.6dBm and −12...
A VCO is fabricated in 0.35 mum CMOS technology for tuner application as a proof of concept for a novel method of resistively tuning the inductance of an LC VCO. By employing a transformer as inductor, L is varied by changing the secondary coil current using active resistors. This eliminates the need for using multiple inductors to cover the frequency spectrum of 1.1 to 1.9 GHz, resulting in large...
A very wide tuning range CMOS MMIC bandpass filter is implemented using active coupled resonators and experimentally demonstrated. It can realise a 0.51 GHz frequency tuning range around 1.8 GHz using a single control voltage, with an ultra-compact size of 0.28 mm and a very low DC power consumption of 41 mW.
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