A 210.4-dBc/Hz FoMT 67.9% Tuning Range LC-VCO IC with a Single Analog Voltage-Controlled Novel Varactor in 40-nm CMOS SOI

Fang, Mengchu; Kumura, Akihiko; Yoshimasu, Toshihiko

doi:10.1109/rfit52905.2021.9565258

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Many digital switches experience a variety of issues, which contribute to the complexity of tuning voltages as well as the risk of tuning range gaps [3][4][5]. However, a novel varactor [6] has been proposed to broaden the tuning range using a single varactor without the need for digital control signal tuning achieving a tuning range of 40.3%. Some work encounters a disadvantage in improving phase noise at the expense of increased die area and a low quality factor (Q).…”

Section: Introductionmentioning

confidence: 99%

CMOS High Swing and Q Boosted Dual Core Voltage Controlled Oscillator for 5G New Radio Application

Shasidharan,

Rajendran,

Mariappan

et al. 2023

ACES Journal

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This paper describes a low power, low phase noise CMOS voltage controlled oscillator (VCO) with a cascoded cross-coupled pair (XCP) configuration for high data rate 5G New Radio (5G-NR) applications. The core consists of a primary auxiliary VCO built as a negative conductance circuit to improve phase noise and a secondary core with a cascoded formation to increase output voltage swing. A switched varactor array (SVA) wideband tuner is integrated for a wide bandwidth application in a low power implementation. The dual-core VCO was designed in CMOS 130 nm technology and occupies only 1.05 mm2 of space. With a supply voltage of 1.2 V, the VCO achieved a tuning range of 32.43% from 3.45 GHz to 4.47 GHz. At 3.96 GHz carrier center frequency with 1 MHz offset, the total power consumption is 0.7 mW with a corresponding phase noise (PN) of −121.25 dBc/Hz and a Figure of Merit (FoM) of 193.25 dBc/Hz. The results are validated using Cadence Spectra RF simulations.

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