A low power consumption, low phase noise, and wide tuning range LC VCO with ACC

Qi, Xiaodong; Li, Zhiqun

doi:10.1109/icct.2011.6158045

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…Voltage-Control Oscillator (VCO) is a critical module of PLL, and its performance directly influences the performance of PLL [6,7,8,9]. The VCO gain, K VCO , is a key parameter that affects the loop bandwidth, stability, and phase noise [10,11,12]. The LC VCO widely employs a switchable capacitor bank to extend the frequency tuning range [13,14].…”

Section: Introductionmentioning

confidence: 99%

A 5.67-8.75GHz LC VCO with small gain variation for 2.4GHz-band WLAN applications

Tian

Huang

et al. 2021

IEICE Electron. Express

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In this paper, a 5.67-8.75 GHz LC VCO with small gain variation and reconfigurable buffer for 2.4 GHz-band WLAN applications is presented and implemented in a Semiconductor Manufacturing International Corporation (SMIC) 55 nm CMOS process. The VCO gain is a strong function of the capacitance. For wide frequency tuning range meaning the large gain variation. The gain calibration scheme is proposed to obtain small gain variation across the frequency range. This letter proposes a reconfigurable buffer with adjustable amplitude, low jitter, and small supply coupling issues. The results show the proposed gain calibration scheme is very effective. The measured phase noise at 6.69 MHz offset is -123.2 dBc/Hz at 4.9 GHz output frequency.

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Section: Introductionmentioning

confidence: 99%

A 5.67-8.75GHz LC VCO with small gain variation for 2.4GHz-band WLAN applications

Tian

Huang

et al. 2021

IEICE Electron. Express

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show abstract

Design of a low power 5-GHz frequency synthesizer for WSN applications

Cao

et al. 2012

2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)

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Design of Low Power Low Phase Noise 5-GHz Frequency Synthesizer for WSN Applications

Yushen¹,

Li²

2013

Proceedings of 3rd International Conference on Multimedia Technology(ICMT-13)

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A fully integrated 5-GHz PLL frequency synthesizer for WSN applications has been designed and implemented on TSMC 0.18 µm RF CMOS process. In order to realize low power consumption, VCO adopted 6-bit switch resistors array which could provide varied biasing current by auto current calibration (ACC) circuit. Phase switching technique is also used in the frequency divider to reduce power consumption. In order to realize low phase noise, VCO is designed to have small gain and uses 4-bit switch capacitor array to provide wide tuning range. In order to reduce the locking time of PLL system, fast AFC is proposed. PFD is realized by the typical structure with TSPC dynamic D flip-flop. CP structure applying the replica technology is proposed. With a 1.8V supply voltage, the post-simulated minimum power consumption of the synthesizer is 6.4mW. Finally, the chip size of the frequency synthesizer is 1.11  1.54mm 2 with testing buffer and pads.

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A low power consumption, low phase noise, and wide tuning range LC VCO with ACC

Cited by 4 publications

References 11 publications

A 5.67-8.75GHz LC VCO with small gain variation for 2.4GHz-band WLAN applications

A 5.67-8.75GHz LC VCO with small gain variation for 2.4GHz-band WLAN applications

Design of a low power 5-GHz frequency synthesizer for WSN applications

Design of Low Power Low Phase Noise 5-GHz Frequency Synthesizer for WSN Applications

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