Versatile multi-decade CMOS voltage-controlled oscillator with accurate amplitude and pulse width control

  • Authors:

  • Annajirao Garimella;Lalitha Mohana Kalyani-Garimella;Jaime Ramírez-Angulo;Antonio J. Lopez-Martin

  • Affiliations:

  • Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, USA 88003;Intel Corporation, Fort Collins, USA 80528;Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, USA 88003;Department of Electrical and Electronic Engineering, Public University of Navarra, Pamplona, Spain 41007

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2009

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Abstract

A compact, versatile and very high speed approach for waveform generation is introduced. It generates triangle and square waveforms. The VCO has a very wide range of oscillating frequencies, from fractions of Hz to 30 MHz in 0.5 μm CMOS technology. The amplitude of the oscillations can be very precisely controlled. It has linear control over frequency, amplitude and pulse-width. It can be used in frequency, amplitude and pulse-width modulation applications as well as in the accurate piecewise linear waveform synthesis. Experimental results of a MOSIS CMOS AMI 0.5 μm technology test chip are presented that validate the proposed circuit.