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This paper presents a wide tuning rang mm-wave VCO (voltage controlled oscillator) fabricated in IBM 90-nm CMOS technology. The VCO can be tuned from 31.4 GHz to 42.2 GHz and utilizes a differential tuning mechanism based on varactors and switched capacitors. A switched current source is used to improve the performance of the VCO when an MIM (metal-insulated-metal) capacitor is switched in the LC...
A fully integrated double frequency differential LC voltage controlled oscillator (VCO), used in the frequency synthesizer of 2.4GHz IEEE802.15.4/ZigBee Wireless Sensor Network (WSN), is designed and implemented based on TSMC 0.18μm RF CMOS process with low power dissipation and wide tuning range. The core circuit adopts complementary differential negative resistance LC oscillator structure and is...
A fully integrated double frequency differential LC voltage controlled oscillator (VCO), used in the frequency synthesizer of 2.4GHz IEEE802.15.4/ZigBee Wireless Sensor Network (WSN), is designed and implemented based on TSMC 0.18 μm RF CMOS process with low power dissipation and wide tuning range. The core circuit adopts complementary differential negative resistance LC oscillator structure and is...
A novel LC VCO employing an adaptive body-bias is proposed for low power and low voltage high performance signal generation. By using the adaptive body-bias technique, the threshold voltage of the cross-coupled pair is reduced, and meanwhile the effective source-to-drain voltage and oscillation amplitude are increased, which improves the phase noise. In addition, the back-gate capacitances from the...
We present a fully integrated Phase Locked Loop in an advanced 45 nm CMOS technology. The loop filter is integrated on chip under the voltage-controlled oscillator inductor, resulting in significant area savings. The whole PLL measures only 280 mum by 150 mum. The PLL has a dual-band output for 2-2.5 GHz and 4-5 GHz. The circuit operates from a 0.85 V supply and consumes 15.3 mW for a -120 dBc/Hz...
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