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TEMPERATURE COMPENSATED IBAR REFERENCE OSCILLATORS Gavin K. Ho, Krishnakumar Sundaresan, Siavash Pourkamali and Farrokh Ayazi
 

Summary: TEMPERATURE COMPENSATED IBAR REFERENCE OSCILLATORS
Gavin K. Ho, Krishnakumar Sundaresan, Siavash Pourkamali and Farrokh Ayazi
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
ABSTRACT
This work presents a two-chip automatically temperature-
compensated micromechanical IBAR reference oscillator
with a temperature drift of 39ppm over 100C. Temperature
compensation is provided by a parabolic VP correction
scheme and provides 10X improvement over previously
reported results. Tunable 6MHz, 10MHz, and 20MHz
resonators were characterized with 20004500ppm tuning
and Q up to 119000. Motional impedances as low as 218
were extracted from measurement data with VP=18V. The
interface IC for temperature compensation and oscillation
consumes only 1.9mW. Measurements also show that
temperature compensation of a 10MHz resonator with 65nm
gaps is possible with less than 5V.
1. INTRODUCTION
Frequency references are ubiquitous in electronics. In high
performance applications, quartz crystal units have

  

Source: Ayazi, Farrokh - School of Electrical and Computer Engineering, Georgia Institute of Technology

 

Collections: Engineering