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http://dx.doi.org/10.5515/KJKIEES.2010.21.3.223

Design of Temperature Compensation Circuit to Compensate Temperature Characteristics of VCO  

Kim, Byung-Chul (School of Electronic Engineering, Kumoh National Institute of Technology)
Huang, Gui-Hua (School of Electronic Engineering, Kumoh National Institute of Technology)
Cho, Kyung-Rae (School of Electronic Engineering, Kumoh National Institute of Technology)
Lee, Jae-Buom (School of Electronic Engineering, Kumoh National Institute of Technology)
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Abstract
In this paper, temperature compensation circuit for the X-band voltage controlled oscillator(VCO) is presented by using the temperature sensor with the OP-AMP circuit. The frequency drifting by the temperature could be compensated by applying the tuning voltage which include the linearly changing output voltage of the temperature sensor. As a result, the frequency variation is reduced to 6.6~4.4 MHzfrom the 71~73 MHz variation with the compensation circuit over -30~+$60^{\circ}C$ range, when VCO is operated in the frequency range of 9.95~10.05 GHz.
Keywords
Temperature Compensation Circuit; VCO; Temperature Sensor;
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