The methods of maintaining low frequency stability in FBAR based cross-coupled VCO design

Guoqiang Zhang; Abhay Kochhar; Keiji Yoshida; Shuji Tanaka; Kenya Hashimoto; Masayoshi Esashi; Ramesh K. Pokharel

doi:10.1587/elex.10.20130296

The methods of maintaining low frequency stability in FBAR based cross-coupled VCO design

Guoqiang Zhang, Abhay Kochhar, Keiji Yoshida, Shuji Tanaka, Kenya Hashimoto, Masayoshi Esashi, Ramesh K. Pokharel

ENG - Robotics

Research output: Contribution to journal › Letter › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Journal	IEICE Electronics Express
Volume	10
Issue number	12
DOIs	https://doi.org/10.1587/elex.10.20130296
Publication status	Published - 2013 Jul 2

Keywords

Cross-coupled architecture
Film bulk acoustic resonator
Low frequency instability
Phase noise
VCO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1587/elex.10.20130296

Cite this

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title = "The methods of maintaining low frequency stability in FBAR based cross-coupled VCO design",

abstract = "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.",

keywords = "Cross-coupled architecture, Film bulk acoustic resonator, Low frequency instability, Phase noise, VCO",

author = "Guoqiang Zhang and Abhay Kochhar and Keiji Yoshida and Shuji Tanaka and Kenya Hashimoto and Masayoshi Esashi and Pokharel, {Ramesh K.}",

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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.

PY - 2013/7/2

Y1 - 2013/7/2

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.

KW - Cross-coupled architecture

KW - Film bulk acoustic resonator

KW - Low frequency instability

KW - Phase noise

KW - VCO

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The methods of maintaining low frequency stability in FBAR based cross-coupled VCO design

Abstract

Keywords

ASJC Scopus subject areas

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