Page views： 16 
Date：Dec 02,2022
2.1 Frequency Temperature Characteristics
The frequency temperature characteristics of a resonator are represented by the curve shown in the following figure (frequency temperature characteristic curve). However, the actual frequency temperature characteristics differ greatly due to differences in oscillator design, manufacturing methods, and engineering settings.
For example:①Cutting angle of the crystal blank;
②Size of the crystal blank;
③ Surface processing of the crystal blank;
④ Fixation method of the crystal blank;
⑤Electrode material and thickness, etc.
In general, these factors affect the frequency when it is abnormal. As a reference, when the temperature-frequency stability requirement is strict, it is necessary to fully communicate with the manufacturer about the relationship between temperature changes and frequency changes.
2.2 Influence of Oscillating Circuit
The frequency temperature characteristics measured when the resonator is in its single state and those measured when it is assembled as an oscillator are different. This is not only due to the resonator but also to the temperature characteristics unique to the oscillating circuit. In particular, when a variable capacitor diode and inductor are used in a crystal oscillator circuit, their large temperature coefficients affect the temperature characteristics of the crystal oscillator frequency.
No.6 Heilongjiang Road, Yantai Economic and Technological Development Zone, Shandong Province
Tel：0535-6372640
E-mail：xugang@mingdeheng.com
