TY - JOUR
T1 - The methods of maintaining low frequency stability in FBAR based cross-coupled VCO design
AU - Zhang, Guoqiang
AU - Kochhar, Abhay
AU - Yoshida, Keiji
AU - Tanaka, Shuji
AU - Hashimoto, Kenya
AU - Esashi, Masayoshi
AU - Pokharel, Ramesh K.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - In this letter, we propose the methods to mitigate low frequency instability in a film bulk acoustic resonator (FBAR) based cross-coupled voltage-controlled oscillator (FBAR-VCO). The first method employs a capacitor and while the other one employs a series inductor-capacitor. Using the post-layout simulation, a comparative study of the performances such as phase noise and figure of merit (FOM) of the designed FBAR-VCO is carried out. It is found that both the methods inhibit the low frequency instability successfully and the additional advantage of the second method is 2 dB improvement of FOM. Compared to other published FBAR-VCOs, this work has very low phase noise, below -150 dBc/Hz at 1MHz offset frequency, and much better FOM below -210 dB.
AB - In this letter, we propose the methods to mitigate low frequency instability in a film bulk acoustic resonator (FBAR) based cross-coupled voltage-controlled oscillator (FBAR-VCO). The first method employs a capacitor and while the other one employs a series inductor-capacitor. Using the post-layout simulation, a comparative study of the performances such as phase noise and figure of merit (FOM) of the designed FBAR-VCO is carried out. It is found that both the methods inhibit the low frequency instability successfully and the additional advantage of the second method is 2 dB improvement of FOM. Compared to other published FBAR-VCOs, this work has very low phase noise, below -150 dBc/Hz at 1MHz offset frequency, and much better FOM below -210 dB.
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U2 - 10.1587/elex.10.20130296
DO - 10.1587/elex.10.20130296
M3 - Article
AN - SCOPUS:84879437365
VL - 10
JO - IEICE Electronics Express
JF - IEICE Electronics Express
SN - 1349-2543
IS - 12
M1 - 20130296
ER -