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A study of amplitude‐to‐phase noise conversion in planar oscillators
Author(s) -
Djurhuus Torsten,
Krozer Viktor
Publication year - 2021
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.2893
Subject(s) - phase noise , planar , noise (video) , electronic circuit , amplitude , zero (linguistics) , limit (mathematics) , power (physics) , control theory (sociology) , phase (matter) , computer science , electronic engineering , topology (electrical circuits) , mathematics , physics , electrical engineering , engineering , mathematical analysis , quantum mechanics , control (management) , linguistics , philosophy , computer graphics (images) , artificial intelligence , image (mathematics)
Summary This paper explores the many interesting implications for oscillator design, with optimized phase‐noise performance, deriving from a newly proposed model based on the concept of oscillator conjugacy. For the case of 2‐D (planar) oscillators, the model prominently predicts that only circuits producing a perfectly symmetric steady‐state can have zero amplitude‐to‐phase (AM‐PM) noise conversion, a so‐called zero‐state. Simulations on standard industry oscillator circuits verify all model predictions and, however, also show that these circuit classes cannot attain zero‐states except in special limit‐cases which are not practically relevant. Guided by the newly acquired design rules, we describe the synthesis of a novel 2‐D reduced‐order LC oscillator circuit which achieves several zero‐states while operating at realistic output power levels. The potential future application of this developed theoretical framework for implementation of numerical algorithms aimed at optimizing oscillator phase‐noise performance is briefly discussed.