Journal ArticleDOI
Balanced Colpitt oscillator MMICs designed for ultra-low phase noise
TLDR
In this article, the authors presented a balanced voltage-controlled oscillator (VCO) monolithic microwave integrated circuits (MMICs) based on a coupled Colpitt topology with a fully integrated tank utilizing SiGe heterojunction bipolar transistor (HBT) and InGaP/GaAs HBT technologies.Abstract:
Balanced voltage-controlled oscillator (VCO) monolithic microwave integrated circuits (MMICs) based on a coupled Colpitt topology with a fully integrated tank are presented utilizing SiGe heterojunction bipolar transistor (HBT) and InGaP/GaAs HBT technologies. Minimum phase noise is obtained for all designs by optimization of the tank circuit including the varactor, maximizing the tank amplitude, and designing the VCO for Class C operation. Fundamental and second harmonic VCOs are evaluated. A minimum phase noise of less than -112 dBc at an output power of 5.5 dBm is achieved at 100-kHz carrier offset and 6.4-GHz oscillation frequency for the fundamental InGaP/GaAs HBT VCO. The second harmonic VCO achieves a minimum measured phase noise of -120 dBc at 100 kHz at 13 GHz. To our best knowledge, this is the lowest reported phase noise to date for a varactor-based VCO with a fully integrated tank. The fundamental frequency SiGe HBT oscillator achieves a phase noise of -108 dBc at 100 kHz at 5 GHz. All MMICs are fabricated in commercial foundry MMIC processes.read more
Citations
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Journal ArticleDOI
5-GHz Low Power Current-Reused Balanced CMOS Differential Armstrong VCOs
TL;DR: In this article, the authors proposed a 5 GHz low power differential Armstrong voltage controlled oscillators (VCOs) based on balanced topology, which used two single-ended Armstrong VCOs coupled to each other in parallel by balanced structure.
Journal ArticleDOI
Design of Low Phase-Noise Oscillators and Wideband VCOs in InGaP HBT Technology
TL;DR: In this article, a method for design of low phase-noise balanced-Colpitts (BC) fixed-frequency oscillators and wideband voltage-controlled oscillators (VCOs) is presented.
Journal ArticleDOI
Design of Ultra-Low Phase Noise and High Power Integrated Oscillator in $0.25~\mu{\rm m}$ GaN-on-SiC HEMT Technology
TL;DR: In this paper, a novel ultra-low phase noise and high power integrated oscillator is presented, which achieves the lowest phase noise compared to other GaN-on-SiC high electron mobility transistor (HEMT) based integrated oscillators.
Journal ArticleDOI
4.9-GHz low-phase-noise transformer-based superharmonic-coupled GaInP/GaAs HBT QVCO
TL;DR: In this article, a low-phase-noise GaInP/GaAs heterojunction bipolar transistor (HBT) quadrature voltage controlled oscillator (QVCO) using transformer-based superharmonic coupling topology is demonstrated for the first time.
Proceedings ArticleDOI
Low Phase Noise sub-1 V Supply 12 and 18 GHz VCOs in 90 nm CMOS
TL;DR: In this paper, a cross-coupled differential NMOS pair VCO achieves a phase noise of?117 dBc/Hz at 1 MHz offset while consuming only 1.6 mW from a 0.47 V supply.
References
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Journal ArticleDOI
Concepts and methods in optimization of integrated LC VCOs
Donhee Ham,Ali Hajimiri +1 more
TL;DR: In this article, a design strategy centered around an inductance selection scheme is executed using a practical graphical optimization method to optimize phase noise subject to design constraints such as power dissipation, tank amplitude, tuning range, startup condition, and diameters of spiral inductors.
Journal ArticleDOI
Development of 60-GHz front-end circuits for a high-data-rate communication system
TL;DR: In this paper, the results from a Swedish program for development of 60-GHz monolithic microwave integrated circuits (MMICs) for high-data-rate communication links are presented.
Journal ArticleDOI
A 21.5/43-GHz dual-frequency balanced Colpitts VCO in SiGe technology
TL;DR: In this article, a balanced Colpitts voltage-controlled oscillator (VCO) is designed and fabricated in a commercially available 0.25/spl mu/m SiGe BiCMOS process.
Journal ArticleDOI
Ku-band InGaP-GaAs HBT MMIC VCOs with balanced and differential topologies
TL;DR: Balanced and differential voltage controlled oscillators (VCOs) are investigated with analytic noise models in this paper, where the B-VCO has higher output power and lower phase-noise performance, while drawing lower current than the differential VCO.