A 4.6 GHz cascade switched biasing LC–QVCO using source-body resistor

Wang, Han; Sun, Liguo; Huang, Lu

doi:10.1007/s10470-013-0149-0

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…In order to characterize the comprehensive performance of the proposed VCO, the figure‐of‐merit (FOM) is widely used and written as

FOM = L ((), normalΔ f) + 10 \log ((), \frac{P_{DC}}{1 mW}) - 20 \log ((), \frac{f_{0}}{Δ f}),

where L (Δ f ) is the phase noise at the offset frequency of Δ f from the oscillating frequency f 0 , and P DC is the power consumption. The FOM of the proposed QVCO are −156.9 and − 154.8 dBc/Hz, which corresponds to the offset frequencies of 100 kHz and 1 MHz from the oscillation frequency of 3.57 GHz, respectively.…”

Section: Resultsmentioning

confidence: 99%

A CMOS fully differential ring VCO with active inductors and I/Q outputs

Zhang

Wang

Fang

et al. 2018

Micro & Optical Tech Letters

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A novel four‐stage fully differential ring voltage controlled oscillator (VCO) is presented and implemented in 0.18 μm CMOS technology. The fully differential delay cell is chosen over the pseudo‐differential one to avoid the cross‐coupling pair, increase the oscillation frequency and improve common‐noise suppression. The inductive shunt peaking technique with active inductors instead of its passive counterpart is used to expand the bandwidth of the delay cell and then increase the oscillation frequency of the VCO without the expense of excessive area. The current bleeding transistor pair is connected in shunt with the tuning transistor pair in order to make sure the VCO oscillate over the entire tuning voltage with proper phase noise. Measurement results show that, from a single voltage supply of 1.8 V and an occupied area of 475 μm × 275 μm, the proposed VCO achieves an oscillation frequency range from 3.25 to 4.2 GHz with the optimum phase noise of −92.28 dBc/Hz at 1 MHz and an optimum FOM of −154.80 dBc/Hz.

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“…In order to characterize the comprehensive performance of the proposed VCO, the figure‐of‐merit (FOM) is widely used and written as

FOM = L ((), normalΔ f) + 10 \log ((), \frac{P_{DC}}{1 mW}) - 20 \log ((), \frac{f_{0}}{Δ f}),

Section: Resultsmentioning

confidence: 99%

A CMOS fully differential ring VCO with active inductors and I/Q outputs

Zhang

Wang

Fang

et al. 2018

Micro & Optical Tech Letters

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show abstract

“…Fosc= 1 2π√L(Cvar+Cp) (7) Here, LC oscillator is required to tune at 2.4GHz frequency for ISM band application and tuning range of 80MHz. From the equ.…”

Section: Conventional Oscillator Proposed Oscillator Offset Frequencymentioning

confidence: 99%

“…It is also shown that the working in weak and moderate inversion region results in low current and increases phase noise. In [ [7] [10]], phase noise reduction in LC oscillator using tail current shaping is achieved with two extra transistors with RC network. In [ [11]], a 2.4GHz LC oscillator is proposed with tail current biasing and gate resistance matching techniques to reduce phase noise.…”

Section: Introductionmentioning

confidence: 99%

Phase Noise Reduction Technique for ISM Band LC Oscillator Using Tail Current

Thakore¹,

Shah²,

Devashrey

2021

Wseas Transactions on Electronics

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This paper presents low phase noise, precise frequency tuning range LC Voltage controlled Oscillator (VCO) circuit of Phase lock loop, to support - IEEE 802.11a/b/g, Bluetooth, Zigbee and IEEE 802.15.4., operating on 2.4GHz ISM band (Industrial, Scientific, Medical). The presented circuit is implemented in Cadence virtuoso environment and using GPDK090 Library of 90nm CMOS Technology. The presented VCO is tuned at 2.4GHz frequency with tuning range of 80MHz. The measured Phase noise is -126.3dBc/Hz at 1MHz offset frequency. The total power consumption of the presented VCO is 4.7mw at 1V power supply.

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A 4.6 GHz cascade switched biasing LC–QVCO using source-body resistor

Cited by 2 publications

References 11 publications

A CMOS fully differential ring VCO with active inductors and I/Q outputs

A CMOS fully differential ring VCO with active inductors and I/Q outputs

Phase Noise Reduction Technique for ISM Band LC Oscillator Using Tail Current

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