Simulation and demonstration for the thermoelectric cooler to improve warm-up time of OCXO

Due to the constant temperature oven, the OCXO can have a higher frequency stability in both long-term and short-term comparing to other crystal oscillators. However, most of OCXOs are using passive temperature control components, such as heating resistors or power transistors, which makes OCXOs have long warm-up time and ease to be affected by the ambient temperature fluctuation. In this paper, demonstration of using the thermoelectric cooler as the temperature control for the OCXO has been studied. Simulation results show good consistence with the test results for using the TEC for the OCXO. Temperature control test results demonstrate the feasibility of using the TEC to control the temperature of the OCXO to improve the warm-up time and have better temperature stability.