Title :
A 2 GHz VCO with process and temperature compensation
Author :
Chen, Huiting ; Lee, Edward ; Geiger, Randall
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
A CMOS VCO with inherent compensation for temperature and process variations is presented. In the new design, the VCO input control is divided into two parts. One is controlled by a temperature and process compensation bias circuit and the other is controlled by an external input. A phase locked loop is used as the temperature and process compensation bias circuit. Two ideally identical VCOs are used. The control voltage of the VCO in the PLL will track the temperature and process variations. This control voltage is fed back to the VCO outside the loop. Simulation results show the total variation in the VCO frequency over a 100°C temperature range and over the fast and slow process corners is about ±1.7%. This is a reduction of in excess of a factor of 12 when compare to a conventional VCO design based on the same delay stage
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; compensation; delay circuits; phase locked loops; voltage-controlled oscillators; 0 to 100 degC; 2 GHz; CMOS; VCO; bias circuit; control voltage; delay stage; input control; phase locked loop; process variation compensation; temperature compensation; Circuits; Filters; Frequency; Jitter; Phase locked loops; Temperature control; Temperature distribution; Temperature sensors; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780818
