关键词: ?高低温, 等精度频率测量, 自动测试

Abstract: With the development of manufacturing technology and integrated circuit，even to this day, oscillator have integrated into chips. Because the MOS devices and resistors that constitute the oscillator are easy to change with the voltage and temperature, the frequency deviation of the chips will be caused by different voltages and temperatures. In response to this problem, this article introduces the principle and implementation method of a frequency automatic test system in high and low temperature. The hardware uses STM32F107 as the main controller, with high and low temperature test box, using equal precision frequency measurement method to achieve frequency measurement in different temperature and different voltage. The software system is based on MFC. Proved by actual use, the test system has the advantages of high accuracy, low-error, fast-speed, etc.

Key words: highandlowtemperature, equalprecisionfrequencymeasurement, automatictesting