1.51-GHz with Q
>10,000 Even in Air!
A result of
purposely impedance-mismatching a polydiamond disk with its polysilicon stem.
1.2-GHz with Q = 14,600!
Who says diamond is needed to get Q
>10,000 at GHz frequencies? With the right "hollow-disk" ring
design, polysilicon can do even better than diamond.
60-MHz Wine-Glass Disk Oscillator Makes
the GSM Reference Oscillator Spec!
handling and a Q >50,000 crucial in making the spec.
Arraying for Impedance <480W at 72MHz!
coupled resonator arrays automatically align resonator frequencies to allow
output summation for low impedance and higher power handling.
Cognitive Radio (2009)
Micromechanical Resonator Wins
Best Paper Award at the 2005 IEEE Int. Frequency Control Symposium!
to Yu-Wei Lin for winning the Best Frequency Control Paper Award at the 2005
IEEE Int. Frequency Control Symposium.
Clock Overview Paper Wins the Jack Raper Award at the
2005 IEEE Int. Solid-State Circuits Conference!
to all those in the CSAC program (which Prof. Nguyen ran while at DARPA),
especially John Kitching from NIST, who co-authored this paper.
Vibrating RF MEMS Wins
Best Invited Paper Award at the 2004 IEEE Custom Integrated Circuits
Read this for an
overview on vibrating RF MEMS.
Oscillator Wins 2004 UFFC
Symposium Best Frequency Control Paper Award!
to Seungbae Lee for winning the Best Frequency Control Paper Award at the 2004
IEEE Ultrasonics, Ferroelectrics, and Frequency Control 50th Anniv. Joint
Resonator Work Wins 2003 IEDM Best Paper Award!
to Yuan Xie for winning the 2003 Int. Electron Devices Meeting Roger A. Haken
Best Student Paper Award.
to Reduce Standard Deviation (2009)
Displacement Amplifier (2009)
T.-C. Nguyen, “Integrated
micromechanical RF circuits for software-defined cognitive radio
(invited plenary),” Proceedings,
the 26th Symposium on Sensors, Micromachines &
Applied Systems, Tokyo, Japan, Oct. 15-16, 2009, pp. 1-5.
Akgul, B. Kim, L.-W. Hung, Y. Lin, W.-C. Li, W.-L. Huang, I.
Gurin, A. Borna, and C. T.-C. Nguyen, “Oscillator
far-from-carrier phase noise reduction via nano-scale gap tuning of
micromechanical resonators,” the 15th Int. Conf. on
Solid-State Sensors, Actuators, & Microsystems
(Transducers’09), Denver, Colorado, June 21-25, 2009, pp. 798-801.
Lin, W.-C. Li, I. Gurin, S.-S. Li, Y.-W. Lin, Z. Ren, B. Kim, and C.
T.-C. Nguyen, “Digitally-specified
micromechanical displacement amplifiers,” the 15th
Int. Conf. on Solid-State Sensors, Actuators, & Microsystems
(Transducers’09), Denver, Colorado, June 21-25, 2009, pp. 781-784.
Li, Y. Lin, B. Kim, Z. Ren, and C. T.-C. Nguyen, “Quality
factor enhancement in micromechanical resonators at cryogenic
temperatures,” the 15th Int. Conf. on Solid-State
Sensors, Actuators, & Microsystems (Transducers’09), Denver,
Colorado, June 21-25, 2009, pp. 1445-1448.
Y. Lin, W.-C. Li, B. Kim, Y.-W. Lin, Z. Ren, and C.
T.-C. Nguyen, “Enhancement
of micromechanical resonator manufacturing precision via
mechanically-coupled arraying,” Proceedings,
2009 IEEE Int. Frequency Control Symp., Besancon, France, April
20-24, 2009, pp. 58-63.
B. Kim, Y. Lin, W.-L. Huang, M. Akgul, W.-C. Li, Z.
Ren, and C. T.-C. Nguyen, “Micromechanical
resonant displacement gain stages,” Tech. Digest, 22nd IEEE Int. Conf. on Micro Electro
Mechanical Systems (MEMS’09), Sorrento, Italy, Jan. 25-29, 2009,