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A 0.137mm29 GHz hybrid class-B/C QVCO with output buffering in 65nm CMOS
Md. Tawfiq Amin1; Pui-In Mak1; Rui P. Martins1,2
2014-10-01
Source PublicationIEEE Microwave and Wireless Components Letters
ISSN1531-1309
Volume24Issue:10Pages:716-718
Abstract

A compact realization of hybrid class-B/C quadrature voltage-controlled oscillator (QVCO) with output buffering is proposed. It employs a four-phase amplitude detector feedback loop to shift the operation mode from hybrid class-B/class-C to class-C after power up. The power-efficient class-C core allows quadrature-locking via passive capacitive coupling, whereas the auxiliary class-B core ensures a robust startup. For higher output drivability, PMOS-based source followers are stacked atop the QVCO for reusing its bias current and avoiding any AC-coupling networks. The buffered QVCO can directly drive up the 50-Ω port of testers, or to withstand a large capacitive load in on-chip signal distribution. The fabricated 9 GHz QVCO in 65 nm CMOS draws 10.5 mW and exhibits -99.37-dBc/Hz phase noise at 1 MHz offset. The active area is just 0.137 mm by using two compact spiral inductors with patterned ground shields.

KeywordBuffer Cmos Class-b Class-c Phase Noise Qu!adrature Voltage-controlled Oscillator (Qvco)
DOIhttp://doi.org/10.1109/LMWC.2014.2344449
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000343611100022
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.State-Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE, University of Macau, Macao, China
2.Instituto Superior Técnico (IST)/U of Lisbon, Lisbon, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Md. Tawfiq Amin,Pui-In Mak,Rui P. Martins. A 0.137mm29 GHz hybrid class-B/C QVCO with output buffering in 65nm CMOS[J]. IEEE Microwave and Wireless Components Letters,2014,24(10):716-718.
APA Md. Tawfiq Amin,Pui-In Mak,&Rui P. Martins.(2014).A 0.137mm29 GHz hybrid class-B/C QVCO with output buffering in 65nm CMOS.IEEE Microwave and Wireless Components Letters,24(10),716-718.
MLA Md. Tawfiq Amin,et al."A 0.137mm29 GHz hybrid class-B/C QVCO with output buffering in 65nm CMOS".IEEE Microwave and Wireless Components Letters 24.10(2014):716-718.
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