Resonant-Inductive Degeneration for Manifold Improvement of Phase Noise in Bipolar LC-Oscillators

Autor:	John R. Long, Aleksandar Miodrag Tasic, Wouter A. Serdijn
Rok vydání:	2010
Předmět:	Physics business.industry Noise spectral density Frequency drift Electrical engineering Variable-frequency oscillator Noise figure Voltage-controlled oscillator Noise generator Phase noise Optoelectronics Colpitts oscillator Electrical and Electronic Engineering business
Zdroj:	IEEE Transactions on Circuits and Systems I: Regular Papers. 57:1175-1186
ISSN:	1558-0806 1549-8328
DOI:	10.1109/tcsi.2009.2030100
Popis:	Resonant-inductive degeneration of bias current source is described in this paper as a method for a manifold improvement of phase noise in inductance-capacitance (LC) voltage- controlled oscillators. For the verification of this phase-noise reduction method, a test bipolar LC-oscillator has been designed using a phase-noise model obtained from the spectral noise analysis. By forming a resonance at twice the oscillation frequency in the emitter of the bias current source transistor, phase noise of the LC-oscillator is improved by 6 dB. Phase noise of - 112 dBc/Hz at 1 MHz offset from a 5.7 GHz-band carrier has been realized using oscillator with resonant-inductive degeneration, while drawing 4.8 mA from a 2.2 V supply. The test oscillator achieves a frequency tuning range of 600 MHz, between 5.45-6.05 GHz.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dac03a1cf1d9e1d3aef6f4bd31d526ec https://doi.org/10.1109/tcsi.2009.2030100 Zobrazit plný text záznamu