1 research outputs found
A modified multiphase oscillator with improved phase noise performance
This paper investigates the factors that influence the phase noise
performance of an oscillator and proposes a modified structure for improved
phase noise performance. A single and multiphase oscillator analysis using
the harmonic balance method is presented. The modified structure increases
the oscillation amplitude without increasing the bias current and leads to
improved phase noise performance as well as decreased power consumption.
The modification is analyzed and the figure of merit of the oscillator shows a
significant improvement of 21 dB. Numerical and analytical solutions are
presented to predict the oscillation frequency and phase noise. The analytical
solution is used to approximate the first harmonic and can be combined with
numerical simulations to extrapolate phase noise performance.The measurements relating to this work were enabled through the support of
SAAB Electronic Defence Systems (EDS). Funding was also received from
the National Research Foundation (NRF), Department of Science and
Technology, South Africa. NRF funding was for measurement equipment –
a millimeter-wave vector network analyzer (under grant ID: 72321) and
wafer-prober (under grant ID: 78580). NRF funding (under grant ID: 72321)
also allowed collaboration with Prof Luca Larcher, Università degli studi di
Modena e Reggio Emilia, Italy.http://www.elsevier.com/locate/mejo2018-04-30am2017Electrical, Electronic and Computer Engineerin