A Low Phase-Noise Wide Tuning-Range Quadrature Oscillator Using a Transformer-Based Dual-Resonance Ring

Bajestan, Masoud Moslehi; Rezaei, Vahid Dabbagh; Entesari, Kamran

doi:10.1109/tmtt.2015.2409252

Cited by 28 publications

(15 citation statements)

References 25 publications

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“…Figure 41 shows a sample of measured phase noise curve at 2.3GHz in lower mode. The FoM of the VCO ranges from 188-193dB which is comparable to state-of-the-art designs [1]- [55]. The oscillator performances are summarized in Table IV and compared with other state-of-the-art oscillators.…”

Section: Phase Noise and Tuning Range Measurementsmentioning

confidence: 83%

“…The Class-C approach seems to be a good alternative due to its high dc-to-RF power conversion efficiency along with the prevention of gm-devices from entering the triode regions [17], [18]. Nevertheless, the latter constraint limits a Class-C to achieve its [55]. Of one particular interest, is the use of magnetic (inductive) and electric (capacitive) coupling resonant-mode switching scheme that significantly increases tuning range without degrading PN in Class-B [54].…”

Section: Figurementioning

confidence: 99%

“…However, current standards for various RF applications necessitate the need for simultaneous low phase noise and wide tuning range. Several studies have been conducted to operate oscillators for multiple frequency bands without impairing phase noise [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. Phase noise-tuning range trade-off limits the use of varactors without degrading the stringent phase noise requirement [37].…”

Section: Wideband Oscillatorsmentioning

confidence: 99%

“…In the design of the Class-F VCO, a 6-bit binary weighted switched metalinsulator-metal (MIM) capacitor array is used for coarse tuning [ 55,65]. Figure 34 shows high impedance resistance (R) when the switch is OFF warranting that the switch is complete turned off when a high voltage is applied to the MOS gate.…”

Section: Capacitor Designmentioning

confidence: 99%

“…If the parasitic capacitance and resistance of the MIM cap is negligible, the complete single-ended capacitance derived from the model can be calculated as A 6-bit binary weighted capacitor array can satisfy the requirement for the desired operating tuning range [55].…”

Section: Capacitor Designmentioning

confidence: 99%

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A low phase noise wide-tuning range class-F VCO based on a dual-mode resonator in 65nm CMOS

Dhamani

Sepidband

Entesari

2018

2018 IEEE Radio and Wireless Symposium (RWS)

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A Voltage Controlled Oscillator (VCO) is a critical building block in the design of current frequency synthesizers for RF system applications. State-of-the-art operation defines that an oscillator should have the best spectral purity while consuming low amount of power for a wide tuning range.With this in mind, this work presents a low phase noise wide tuning range Class-F VCO using a dual-mode resonator. In comparison to other conventional wideband oscillators, the proposed capacitively/inductively-coupled resonator will integrate the benefits of Class-F voltage control oscillators and dual-mode switching networks to obtain simultaneous low phase noise and wide-tuning range. The proposed structure, prototyped in 65nm TSMC CMOS technology, shows a 2.14 -4.22GHz continuous tuning range, phase noise figure-of-merit (FoM) of 192.7dB at 2.3GHz and better than 188dB across the entire operating frequency range. The oscillator consumes 15-16.4mW from a 0.6V supply and occupies an active area of 0.7mm 2 . In conclusion, the proposed resonator achieves 2-3dB phase noise improvement while achieving 65% overall tuning range when compared to a typical class-F VCO architecture. iii DEDICATION To Dad iv ACKNOWLEDGEMENTS Every successful thesis requires the constant help and support of others. Firstly, I would like to deeply thank Dr. Kamran Entesari, my research advisor, for giving me an opportunity to work in the Analog domain and guiding me throughout the endeavor. His valuable guidance, commitment and encouragement and his patience are the reason behind the successful completion of my thesis. Dabbagh Rezaei, each of whom, have helped me in various aspects of design, layout and testing. I am indebted to them and extremely grateful for their help and guidance.A special thanks to my parents and friends for all the inspiration, encouragement, support, love and sacrifice throughout all these years, without whom I wouldn't have been able to complete this work. v CONTRIBUTORS AND FUNDING SOURCESThis work was supervised by a thesis committee consisting of Dr. Kamran

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Section: Phase Noise and Tuning Range Measurementsmentioning

confidence: 83%