A Low Power CMOS VCO for IEEE 802.11a Applications

Weng, Ro-Min; Sie, M.; Liu, Chunyu

doi:10.1109/rfit.2007.4443923

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…In Ref. 11, in order to decrease the power consumption, two resistances are added to the VCO in the path of power supply. But since these resistances were used in di®erential mode, the overall transconductance of the crosscoupled transistors was reduced and hence the amplitude of the oscillator output waveform was decreased and the phase noise was destroyed.…”

Section: Common Mode Double-pseudo-resistancementioning

confidence: 99%

A Novel Wideband Cmos Vco Using Switch Capacitors Array for Rf Applications

Niaboli-Guilani

Maghsoodi

Saberkari

et al. 2012

J CIRCUIT SYST COMP

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This paper presents a novel low power consumption, low phase noise, and high tuning range CMOS cross-coupled voltage-controlled oscillator (VCO). Using common mode double-pseudoresistance technique in the proposed circuit leads to low power dissipation without degrading the phase noise. Additionally, band-switching capacitor array is employed in order to increase the tuning range. The schematic circuit of the proposed VCO is simulated in 0.18 m 1P6M CMOS process and simulation results show high e±ciency of the proposed circuit. The overall tuning frequency range is from 1.7 GHz to 3.18 GHz (59%) with tuning voltage variation range from 0 V to 1.5 V. The proposed VCO circuit has phase noise of À102:6 and À124:3 dBc/Hz at 100 KHz and 1 MHz o®set frequency from the carrier, respectively, while consumes 1.98 mW power at 1.5 V supply voltage.

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Section: Common Mode Double-pseudo-resistancementioning

confidence: 99%

A Novel Wideband Cmos Vco Using Switch Capacitors Array for Rf Applications

Niaboli-Guilani

Maghsoodi

Saberkari

et al. 2012

J CIRCUIT SYST COMP

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“…VCO is a fundamental comprising element of PLL (Phase Locked Loop), which is the basic building block of RF transceiver [2]. Furthermore, the frequency synthesizers, high efficient transmitter, ADC (analog-to-digital converter), local oscillator have a fundamental inclusive part, VCO [3][4][5][6]. Small silicon area, low power consumption, low phase noise and wide tuning range are the basic performance parameters of a VCO.…”

Section: Introductionmentioning

confidence: 99%

“…Here 𝑔 𝑚1 is relative to 𝐽 1 + 𝐽 3 but 𝑔 𝑚3 just corresponding to 𝐽 1 . The other equations are cited below L= C gs2 g m1 g m2 ,R s = g ds1 g ds3 g m1 g m2 g m3 C=C gs1 , G=g ds2 +g m1 ≈g m1 (3) The resonant frequency and the quality factor at resonant frequency are given by…”

mentioning

confidence: 99%

International Journal of Electronics and Telecommunications

Faruqe

Amin

2019

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This paper presents active inductor based VCO design for wireless applications based on analysis of active inductor models (Weng-Kuo Cascode active inductor & Liang Regular Cascode active inductor) with feedback resistor technique. Embedment of feedback resistor results in the increment of inductance as well as the quality factor whereas the values are 125.6@2.4GHz (Liang) and 98.7@3.4GHz (Weng-Kuo). The Weng-Kuo active inductor based VCO shows a tuning frequency of 1.765GHz ~2.430GHz (31.7%), while consuming a power of 2.60 mW and phase noise of -84.15 dBc/Hz@1MHz offset. On the other hand, Liang active inductor based VCO shows a frequency range of 1.897GHz ~2.522GHz (28.28%), while consuming a power of 1.40 mW and phase noise of -80.79 dBc/Hz@1MHz offset. Comparing Figure-of-Merit (FoM), power consumption, output power and stability in performance, designed active inductor based VCOs outperform with the stateof-the-art.

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