Low Phase Noise Concurrent Dual-Band (5/7 GHz) CMOS VCO Using Gate Feedback on Nonuniformly Wound Transformer

Oh, Seongwoog; Seo, Kwang-Seok; Oh, Jungsuek

doi:10.1109/lmwc.2020.3045192

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…[8][9][10][11][12] Although transform-based dual-band VCOs have been explored in Ref. [13][14][15][16], the tuning ranges are still not enough. In addition, the transformer-based tank is susceptible to significant parasitics from other cores and its imbalanced quality factor can cause phase noise variation between the two modes.…”

Section: Introductionmentioning

confidence: 99%

X‐ and Ku‐ bands wideband low‐noise phase‐locked loop in 0.13 μm SiGe BiCMOS technology

Cheng

Wei

2022

Int J RF Mic Comp-Aid Eng

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This paper presents a 9.4 ~ 20.6 GHz low‐noise phase‐locked loop (PLL) in 0.13‐μm SiGe BiCMOS technology for 5G applications. To achieve the wideband and phase noise performance simultaneously, a four‐core Colpitts voltage‐controlled oscillato array with 2‐bit switched capacitors and 2‐bit‐control bias currents is used in the PLL loop. In order to optimize the programmable frequency divider accurately, the injection‐locking behavior model of the dual‐mode prescaler is quantitatively analyzed, which is proved to be effective through the tape‐out. The fabricated proposed PLL achieves the average phase noise of −100.5 dBc/Hz at 1‐MHz offset, wideband locking range of 74.7% and the high FOMT of 183.3 dBc/Hz. It occupies an area of 8.4 mm2, and its maximum power consumption is 319.7 mW.

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Section: Introductionmentioning

confidence: 99%

X‐ and Ku‐ bands wideband low‐noise phase‐locked loop in 0.13 μm SiGe BiCMOS technology

Cheng

Wei

2022

Int J RF Mic Comp-Aid Eng

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“…Dual‐band wireless transceivers demand a wider operating bandwidth nowadays, which can exhibit superior performance under some complex circumstances 1,2 . As an indispensable element in a dual‐band transceiver front‐end, the dual‐band voltage‐controlled oscillator (DVCO) has been increasingly developed 3–9 . Especially, the DVCO with a wide frequency tuning range (FTR) and low phase noise can adapt to the development of a wideband transceiver with high sensitivity 10 .…”

Section: Introductionmentioning

confidence: 99%

“…As for the previously reported wideband DVCOs, they were mainly realized based on the CMOS process 3–7 . However, the phase noise of this type of DVCO is limited to the quality factor of the used resonator.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 As an indispensable element in a dual-band transceiver front-end, the dual-band voltage-controlled oscillator (DVCO) has been increasingly developed. [3][4][5][6][7][8][9] Especially, the DVCO with a wide frequency tuning range (FTR) and low phase noise can adapt to the development of a wideband transceiver with high sensitivity. 10 By utilizing the phase-locked loop technique, the DVCO can be locked to a certain frequency at one of two bands, which can provide a dual-band transceiver with a high-quality local oscillator signal.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 As for the previously reported wideband DVCOs, they were mainly realized based on the CMOS process. [3][4][5][6][7] However, the phase noise of this type of DVCO is limited to the quality factor of the used resonator. To further improve the phase noise performance of a DVCO, the DVCOs based on the PCB process were also developed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A low phase noise dual‐band voltage‐controlled oscillator based on switchable tunable filter

Wang¹,

Lai

Wang³

et al. 2022

Micro & Optical Tech Letters

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In this letter, a parallel‐feedback dual‐band voltage‐controlled oscillator (DVCO) with low phase noise and a wide tuning range is proposed. The DVCO is composed of two tunable filters associated with four switches and an active device. By controlling four switches, the oscillation frequency can be switched and oscillated in one of two bands. The employed tunable filter with maintained passband shape and wide frequency tuning range (FTR) is beneficial to designing wideband DVCO with low phase noise. Owing to the maintained frequency response, the sharp phase variation and high in‐band group delay can be maintained during the filter tuning process, which can enhance the phase noise improvement. Moreover, the sharp phase variation can realize the phase compensation in a wide FTR when tuning the DVCO. To develop a DVCO with a simple circuit scheme, the two‐pole tunable filters with two different FTRs are designed. For verification, the proposed DVCO is designed, manufactured, and measured. The measurement results show that each band of the DVCO has a tuning range of 1.97–2.58 GHz (27.8%) and 2.934–3.468 GHz (16.7%), respectively. For the lower band, the phase noise at 100 kHz and 1 MHz frequency offset is better than −99.2 and −126.4 dBc/Hz, respectively. While for the upper band, the phase noise at 100 kHz and 1 MHz frequency offset is better than −101.2 and −127.4 dBc/Hz, respectively.

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Comprehensive review and study for the CMOS transformer tank voltage‐controlled oscillator

Mansour,

Mansour

2024

Circuit Theory & Apps

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This article comprehensively reviews and studies CMOS transformer tank voltage‐controlled oscillators (VCOs) designed to improve the frequency tuning range (FTR) and minimize phase noise (PN) across a broad frequency range, particularly for mm‐wave and fifth‐generation applications. The study focuses on enhancing the performance of the oscillators to meet the demanding requirements of these advanced applications. This study thoroughly investigates and compares various strategies to increase the FTR, minimize PN, and reduce power dissipation in transformer tank VCOs. The aim is to establish fundamental guidelines for implementing transformer‐based tank VCOs. The study comprehensively reviews and analyzes the overall architecture of transformer‐based tank VCOs, presenting a detailed examination of the methods employed to enhance VCO performance. Additionally, the study illustrates the impact of the coupling factor on the VCO's performance parameters, detailing and demonstrating the overall tank circuit quality factor (Q) and resonator coupling factor (κ). A thorough understanding of PN methodology and the limitations of FTR has led to the development of innovative architectures. These include transformer‐based capacitive feedback (FB) oscillators with resistively adjusted variable inductors, as well as class‐F and inverse class‐F VCOs. These novel architectures contribute significantly to the improvement of oscillator performance.

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Low Phase Noise Concurrent Dual-Band (5/7 GHz) CMOS VCO Using Gate Feedback on Nonuniformly Wound Transformer

Cited by 6 publications

References 7 publications

X‐ and Ku‐ bands wideband low‐noise phase‐locked loop in 0.13 μm SiGe BiCMOS technology

X‐ and Ku‐ bands wideband low‐noise phase‐locked loop in 0.13 μm SiGe BiCMOS technology

A low phase noise dual‐band voltage‐controlled oscillator based on switchable tunable filter

Comprehensive review and study for the CMOS transformer tank voltage‐controlled oscillator

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