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Proceedings ArticleDOI: 10.1109/ICCSP.2019.8697905

Design of Millimeter Wave LC Oscillators for 5G Applications

01 Apr 2019-
Abstract: This paper deals with the design of various LC oscillators around 25 GHz which can be used for millimeter wave CMOS radios. Cross coupling is a standard technique used in oscillators and the losses in an LC tank is replenished by the negative resistance of the cross coupled circuit. This paper utilizes cross coupling technique to design oscillators centred around 25 GHz. Four topologies of oscillators are designed in 90nm CMOS technology with a peak to peak output swing of 800mV from a 1.2V supply. The design uses a non ideal inductor modeled with parasitic elements. The simulated phase noise results with the non ideal inductor is around – 97 dBc / Hz at an offset of 1 MHz and the total power consumption is around 60 µW. more

Topics: Negative resistance (57%), LC circuit (56%), Phase noise (53%) more

Journal ArticleDOI: 10.1109/PROC.1966.4682
01 Feb 1966-
Topics: Phase noise (69%), Oscillator phase noise (63%), Colors of noise (62%) more

2,325 Citations

Open accessJournal ArticleDOI: 10.1109/4.658619
Ali Hajimiri1, Thomas H. Lee1Institutions (1)
Abstract: A general model is introduced which is capable of making accurate, quantitative predictions about the phase noise of different types of electrical oscillators by acknowledging the true periodically time-varying nature of all oscillators. This new approach also elucidates several previously unknown design criteria for reducing close-in phase noise by identifying the mechanisms by which intrinsic device noise and external noise sources contribute to the total phase noise. In particular, it explains the details of how 1/f noise in a device upconverts into close-in phase noise and identifies methods to suppress this upconversion. The theory also naturally accommodates cyclostationary noise sources, leading to additional important design insights. The model reduces to previously available phase noise models as special cases. Excellent agreement among theory, simulations, and measurements is observed. more

Topics: Phase noise (69%), Oscillator phase noise (69%), Noise (69%) more

2,180 Citations

Open accessJournal ArticleDOI: 10.1109/4.760384
Ali Hajimiri1, Thomas H. Lee2Institutions (2)
Abstract: An analysis of phase noise in differential cross-coupled inductance-capacitance (LC) oscillators is presented. The effect of tail current and tank power dissipation on the voltage amplitude is shown. Various noise sources in the complementary cross-coupled pair are identified, and their effect on phase noise is analyzed. The predictions are in good agreement with measurements over a large range of tail currents and supply voltages. A 1.8 GHz LC oscillator with a phase noise of -121 dBc/Hz at 600 kHz is demonstrated, dissipating 6 mW of power using on-chip spiral inductors. more

Topics: Phase noise (65%), Noise (radio) (58%), Electronic oscillator (58%) more

941 Citations

Journal ArticleDOI: 10.1109/4.133172
N.M. Nguyen1, Robert G. Meyer1Institutions (1)
Abstract: Start-up criteria in harmonic oscillators are explored. Conventional criteria for start-up prediction are shown to be necessary but not always sufficient for high-frequency oscillators, due to the effects of parasitic elements. Design methods are derived to allow design of reliable oscillators with a well-defined frequency of oscillation. The theory is confirmed with the design, fabrication, and characterization of a 2-GHz monolithic LC oscillator. > more

124 Citations

Journal ArticleDOI: 10.1109/TIM.1977.4314586
Abstract: This paper is devoted to one aspect of the study of phase noise in oscillators: how an oscillator reacts to internal noise that occurs in the active element. The following theoretical analysis will lead us to express the Leeson's model in a more general form. more

Topics: Oscillator phase noise (59%), Phase noise (59%)

100 Citations