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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 34-40 GHz VCO fabricated in 65 nm digital CMOS technology is demonstrated in this paper. The VCO uses a combination of switched capacitors and varactors for tuning and has a maximum Kvco of 240 MHz/V. It exhibits a phase noise of better than -98 dBc/Hz @ 1-MHz offset across the band while consuming 12 mA from a 1.2-V supply, an FOMT of -182.1 dBc/Hz. A cascode buffer following the VCO consumes 11...
A 5.6 GHz balanced voltage-controlled oscillator (VCO) is designed and implemented in a 0.18 mum CMOS 1P6M process. It consists of two single-ended complementary Colpitts LC-tank VCOs coupled by two pairs of varactors. At the supply voltage of 1.2 V, the output phase noise of the VCO is -119.13 dBc/Hz at 1MHz offset frequency from the carrier frequency of 5.6 GHz, and the figure of merit is -190.29...
This paper presents a low phase noise of the complementary cross-coupled voltage-controlled oscillator, which oscillates at a range of 7.42~8.52 GHz. This VCO utilizes switching capacitor modules in which four channels are able to be selected. Moreover, We makes good use of filtering technique for reduction 1/f noise, and MOS varactors are used as fine tuning. The fully integrated VCO provides excellent...
A low phase noise, large tuning range VCO is implemented using 0.25 um CMOS process. The new method, which can enlarge the tuning range and improve phase noise of CMOS VCO, is presented in this paper. It combines the dominant parallel resonance using standard passive on-chip spiral inductors and the additional series resonance using active inductors consisted of MOSFET, resistor and capacitor. Without...
This paper presents a low phase noise of the complementary cross-coupled voltage-controlled oscillator, which oscillates at a range of 3.64 ~ 5.37 GHz. This VCO utilizes switching capacitor modules in which eight channels are able to be selected. Moreover, MOS varactors are used as fine tuning. The fully integrated VCO provides excellent performance. The bandwidth of frequency is 1.73 GHz and the...
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