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Analysis of power‐frequency trade‐offs in millimeter‐wave CMOS oscillators
Author(s) -
Afzalian Amard,
MiarNaimi Hossein,
Dousti Massoud
Publication year - 2020
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2693
Subject(s) - oscillation (cell signaling) , amplitude , control theory (sociology) , topology (electrical circuits) , nonlinear system , power (physics) , transistor , mathematics , vackář oscillator , electronic engineering , physics , local oscillator , computer science , engineering , voltage , electrical engineering , phase noise , quantum mechanics , genetics , control (management) , combinatorics , artificial intelligence , biology
Summary In this paper, considering the nonlinear effects in two ports consisting of transistor, a general method is proposed for estimating the amplitude of high‐frequency ring oscillators. The proposed method can be generalized to various structures that can be disassembled into similar two ports. Moreover, in each CMOS process, a design procedure can be followed to obtain the desired output power and frequency. This is the first time that the frequency and amplitude of oscillator are related to each other in a system of nonlinear equations. First, considering the maximum achievable oscillation frequency, the analysis of ring oscillator structure is performed for the given output power. The results show that the proposed structure operates at 7 to 18% higher oscillation frequency compared with conventional structures. In the next step, assuming that the oscillator structure and passive network topology are known, another system of nonlinear equations is defined for designing the oscillator for the given frequency and amplitude of oscillation. Finally, the implicit solution, which includes the passive network elements connecting to the transistor, is obtained. The results of equations follow the simulation results with an acceptable error (1% frequency error and about 5% amplitude error).