A CMOS voltage-controlled oscillator with temperature compensation

A CMOS ring-oscillator VCO with temperature compensation has been designed by using 0.6 /spl mu/m CMOS technology. The proposed VCO has a wide operating range from 224 MHz to 974 MHz with a good linearity between the output frequency and the control input voltage. The operating frequency has a temperature coefficient of 86.3 ppm//spl deg/C in the 15/spl sim/125/spl deg/C range. The power consumption of this VCO is 8.3 mW.