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

The cutting angle of quartz crystal rods varies, and their electrical characteristics are also different. Usually, the cutting of quartz crystals at a certain orientation (angle) of the crystal rod coordinate axis is called the cutting type of quartz crystals (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.