The changes in electrical performance of the product at different temperatures.

The cutting angle of quartz crystal rod varies, and its electrical characteristics are also different. Usually, the cutting of quartz crystal rod at a certain orientation (angle) on the coordinate axis of the crystal rod is called the cutting type of quartz crystal chip (see Figure 1). The AT cutting angle is 35 degrees and the BT cutting angle is 49 degrees, both of which are suitable for the frequency range of several MHz to several hundred MHz. The AT cutting angle and the BT cutting angle have different temperature and frequency curves (see Figure 2 and 3). The temperature frequency error of the BT cutting angle is relatively large, while the AT cutting angle is relatively stable. It is the most widely used and widely used cutting application method for quartz chips.