Title
A 2-GHz FBAR-Based Transformer Coupled Oscillator Design With Phase Noise Reduction
Abstract
The oscillator architecture is proposed to reduce the close-in phase noise as well as power consumption. The proposed Colpitts oscillator removes the current source which is the main source of the 1/ <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$f$ </tex-math></inline-formula> noise conversion. The removal of the current source is compensated by using the transformer and cross-coupled capacitors. The 2-GHz film bulk acoustic resonator (FBAR) is used for the high Q frequency selective elements in the oscillator design. According to measurement results, this FBAR-based oscillator shows <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\geq$ </tex-math></inline-formula> 10 dB reduction in close-in phase noise. Specifically, 12-dB lower phase noise is achieved at 100 Hz offset frequency. Measured power consumption is 350 uW, which is almost half of the conventional Colpitts oscillator using same FBAR device.
Year
DOI
Venue
2019
10.1109/TCSII.2018.2867563
IEEE Transactions on Circuits and Systems II: Express Briefs
Keywords
DocType
Volume
Phase noise,Inductors,Power demand,Film bulk acoustic resonators,Capacitors,Resonant frequency
Journal
66
Issue
ISSN
Citations 
4
1549-7747
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Jabeom Koo1417.72
Keping Wang284.42
Richard C. Ruby323.30
Brian P. Otis435340.48