A Wideband Mode-Switching Quad-Core VCO Using Compact Multi-Mode Magnetically Coupled <i>LC</i> Network

Li, Chao; Guo, Jin; Qin, Pei; Xue, Quan

doi:10.1109/jssc.2023.3235347

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…As a result, the die area of the proposed DCO is reduced to some extent. Table 2 shows that the above features help to achieve an excellent balance between die size, phase noise, frequency resolution and resonant frequency, resulting in exceptional FoM and 20 , especially in terms of die area.…”

Section: Measurementsmentioning

confidence: 99%

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

Tang,

Yu,

et al. 2024

Sci Rep

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An optimized millimeter-wave digital controlled oscillator (DCO) in a 40-nm CMOS process is presented in this work. The coarse-tuning modules and medium-tuning modules of the DCO utilize modified binary-weighted digitally controlled transmission lines (DCTLs) to achieve a better compromise among smaller chip size, higher resonant frequency, better tuning resolution and lower phase noise. The tuning precision and die size of the medium tuning bank are improved without changing the binary coding rules by replacing the lowest-weight bit of the DCTLs with switched capacitors. In comparison with traditional DCTLs, the control bits of the coarse and medium tuning modules have been changed from 30 to 8, resulting in a 34.4% reduction in overall length (from 122$$\upmu$$ μ m to 80$$\upmu$$ μ m). In addition, the DCO’s fine-tuning modules are achieved using a binary-weighted switched capacitors array connected to the secondary winding of a low-coupling transformer, which enhances the DCO’s fine-tuning bank for better frequency resolution with less circuit complexity. The measured tuning range of the optimized DCO is 76-81GHz with a smaller die size of 0.12mm$$^2$$ 2 . This results in an outstanding figure of merit ($$FoM_A$$ F o M A ) of − 190.52dBc/Hz.

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Section: Measurementsmentioning

confidence: 99%

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

Tang,

Yu,

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Dual-core coupling VCOs that integrate two oscillators interconnected through a coupling network have also been developed [45], [46], [47], [48]. Typically, the primary core acts as the master oscillator generating the main signal, while the secondary core adjusts the frequency by synchronizing with the primary core through a coupling network.…”

Section: Introductionmentioning

confidence: 99%

A 28-GHz–195-dB FoM_A 3.72-GHz/V Class-B/C Nested-gm VCO With Coupled Tail Filtering in a 65-nm CMOS

Sub Kim,

Oh,

Baek

2024

IEEE Access

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This paper introduces a class-B/C nested-gm voltage-controlled oscillator (VCO) with coupled tail filtering in the 28 GHz band. The addition of only two cross-coupled NMOSs duplicates the gm to boost the transconductance. This topology exhibits the characteristics of coupled VCOs, such as when two VCOs are interconnected through a transformer. The core area is minimized by implementing a tail-filtering inductor for a secondary harmonic filter in same space with the primary transformer. The proposed VCO is fabricated with a 65-nm CMOS process, an output frequency of 25.4-29.12 GHz, and a KVCO of 3.72 GHz/V. It has a supply voltage of 1 V and consumes 16.8 mW of power. It exhibits a phase noise of -105.34 dBc/Hz with a 1 MHz offset. The proposed VCO has a core area of 0.06 mm 2 . The figure of merit (FoM), FoM according to the area, and FoM according to dB, respectively.

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An octave tuning range quad-core VCO using a multi-mode resonator

Duan,

Li,

et al. 2024

AEU - International Journal of Electronics and Communications

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A Wideband Mode-Switching Quad-Core VCO Using Compact Multi-Mode Magnetically Coupled LC Network

Cited by 12 publications

References 24 publications

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

A 28-GHz–195-dB FoM_A 3.72-GHz/V Class-B/C Nested-gm VCO With Coupled Tail Filtering in a 65-nm CMOS

An octave tuning range quad-core VCO using a multi-mode resonator

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A Wideband Mode-Switching Quad-Core VCO Using Compact Multi-Mode Magnetically Coupled LC Network

Cited by 12 publications

References 24 publications

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

An optimized DCO with modified binary-weighted DCTLs based hybrid tuning banks for an E-band DPLL

A 28-GHz–195-dB FoMA 3.72-GHz/V Class-B/C Nested-gm VCO With Coupled Tail Filtering in a 65-nm CMOS

An octave tuning range quad-core VCO using a multi-mode resonator

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About

A 28-GHz–195-dB FoM_A 3.72-GHz/V Class-B/C Nested-gm VCO With Coupled Tail Filtering in a 65-nm CMOS