Resonant-inductive degeneration for manifold improvement of phase noise in bipolar LC-oscillators

Authors:
Aleksandar Tasić;Wouter A. Serdijn;John R. Long
Affiliations:
Qualcomm, San Diego, CA;Electronics Research Laboratory, DIMES, Delft University of Technology, Delft, The Netherlands;Electronics Research Laboratory, DIMES, Delft University of Technology, Delft, The Netherlands
Venue:
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Year:
2010

Citing 3
Cited 2

Analysis and Design of Analog Integrated Circuits

Analysis and Design of Analog Integrated Circuits
Spectral analysis of phase noise in bipolar LC-oscillators: theory, verification, and design

IEEE Transactions on Circuits and Systems Part I: Regular Papers
Adaptive Low-Power Circuits for Wireless Communications

Adaptive Low-Power Circuits for Wireless Communications

Wideband varactorless LC VCO using a tunable negative-inductance cell

IEEE Transactions on Circuits and Systems Part I: Regular Papers
Superposition properties of the phase noise based on the LTV model

Analog Integrated Circuits and Signal Processing

Quantified Score

Hi-index	0.00

Visualization

Abstract

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 rnA from a 2.2 V supply. The test oscillator achieves a frequency tuning range of 600 MHz, between 5.45-6.05 GHz.