Design of low power CMOS LC VCO for direct conversion transceiver

Sankararaju, Manjula; Selvathi, D.

doi:10.3906/elk-1407-24

Cited by 4 publications

(3 citation statements)

References 24 publications

(22 reference statements)

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“…Micrograph and layout of proposed two stage ring VCO IEICE Electronics Express, Vol. 16,No.8,[1][2][3][4] By inserting a resistor between input and output of delay cell, the oscillating frequency could be enhanced without consuming more current. The rail to rail voltage tuning range is obtained by combining tail current tuning and switch on resistance tuning.…”

Section: Resultsmentioning

confidence: 99%

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A low power wide tuning range two stage ring VCO with frequency enhancing

Yan¹,

Wu²,

Hu³

et al. 2019

IEICE Electron. Express

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A wide tuning range frequency enhanced two stage ring voltage controlled oscillator (VCO) is proposed in this letter. The proposed delay cell increases the transmission gain by inserting a resistor between input and output, which consumes lower power to generate same oscillating frequency. A rail-to-rail effective voltage tuning range is obtained by both tuning of tail current and the strength of cross coupled latch. It is important for advanced process, which has low standard supply voltage and high threshold voltage. The proposed VCO is fabricated in TSMC 40 nm CMOS technology. The measured phase noise of proposed VCO is −98.05 dBc/Hz at 1 MHz offset with 1.38 GHz carrier frequency while consuming 1.1 mW from a 1.1 V standard supply. The figure of merit (FoM) is 160.4 dBc/Hz.

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Section: Resultsmentioning

confidence: 99%

“…Voltage controlled oscillator (VCO) is an essential component in modern integrated circuit, such as radio-frequency (RF) transceivers [1,2,3,4,5,6,7,8] and clock data recovery (CDR) systems [9,10,11,12,13,14,15,16,17]. LC VCO has much better jitter performance but limit tuning range.…”

Section: Introductionmentioning

confidence: 99%

A low power wide tuning range two stage ring VCO with frequency enhancing

Yan¹,

Wu²,

Hu³

et al. 2019

IEICE Electron. Express

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“…The VCO operation class plays an important role in power management. Generally, the FoM of class-C is better than class-B VCOs [11,12].…”

Section: Introductionmentioning

confidence: 99%

Low power and low phase noise VCO with dual current shaping for IoT applications

Nejadhasan¹,

Moazenian²,

Abiri³

et al. 2020

Turk J Elec Eng & Comp Sci

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In this paper, two low phase noise and power consumption VCO circuits, which are suitable for Internet of things (IoT) applications, are proposed. In the first structure, in order to have more control of the current consumption, the current shaping technique is used in the PMOS and NMOS biasing circuit. In the second structure, for increasing the oscillation amplitude and reducing the phase noise, independent biasing for the NMOS section is used. In both structures, to increase the frequency tuning range (FTR), without using a capacitor bank, the varactor is used in the biasing structure. In the first structure the supply voltage, output frequency, power consumption, and phase noise are 0.8 V, 2.44 GHz, 0.37 mW, and-117.5 dBc/Hz, respectively, but in the second structure, the supply voltage, output frequency, power consumption, and phase noise are 0.8 V, 2.44 GHz, 0.62 mW, and-120 dBc/Hz, respectively. It should be noted that the two structures are designed and simulated in 65-nm CMOS technology. Finally, the results show that the figure-of-merit for the first and second structures is-190 dBc/Hz and-190.2 dBc/Hz, respectively.

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