CMOS Colpitts LC Reference Oscillator with 70ppm Absolute Frequency Accuracy within 0-80 degrees C


Ates E. O. , Aksin D. Y. , Basyurt P. B.

52nd IEEE International Midwest Symposium on Circuits and Systems, Cancun, Mexico, 2 - 05 August 2009, pp.1002-1003 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/mwscas.2009.5235970
  • City: Cancun
  • Country: Mexico
  • Page Numbers: pp.1002-1003

Abstract

This paper presents design and simulation of two temperature compensated LC Colpitts reference oscillator. First uses an on-chip differential inductor while the other one uses bondwire inductor. Technology is 0.35 mu m 2P/4M CMOS technology with high resistivity poly and thick metal option. Oscillator with on-chip differential inductor consumes 7.5mA from 2.5V supply and absolute peak frequency deviation is 70ppm within 0-80 degrees C and oscillator with bondwire inductor consumes 1.5mA from 2.5V supply and absolute peak frequency deviation is 150ppm between 0-80 degrees C. Nominal operating frequency is 1.5GHz for both oscillators.