Why is crystal oscillator is better | Xtalong
Crystal oscillator circuits generally work on the principle of the inverse piezoelectric effect. An applied electric field will produce mechanical deformations in some materials. Therefore, it exploits the mechanical resonance of a vibrating crystal made of piezoelectric material to generate an electrical signal at a specific frequency. Applying a voltage to the piezoelectric element of the quartz crystal, deformation occurs in the piezoelectric body. The crystal oscillator uses a crystal that can convert electrical energy and mechanical energy into each other. Working in a resonance state can provide stable and accurate single-frequency oscillation. Under normal working conditions, the absolute accuracy of ordinary crystal oscillator frequency can reach 50 parts per million. Using this feature, the crystal oscillator can provide a more stable pulse, which is widely used in the clock circuit of the microchip.
Advantages of Crystal Oscillators
Complete internal composition
The active crystal oscillator does not require the internal oscillator of the DSP main control chip, the connection method is relatively simple, and no matching capacitor is required. The frequency signal is relatively stable, which avoids the problem of frequency offset caused by poor matching of external capacitors, and also greatly reduces the interference of stray signals on the circuit board.
Better output frequency accuracy
Generally, crystal oscillators are used in network communication equipment or remote control equipment because they value the advantages of high frequency accuracy, and the temperature drift and time drift of crystal oscillators are relatively small, and the frequency of crystal oscillators is not adjustable. These characteristics make crystal oscillators more suitable. Applied in intelligent communication equipment.
Low loss and anti-aging
Using a crystal as an oscillator has very little loss and can also ensure stable oscillation. For any electronic product, one of the requirements for the components used is low loss and stability, and the crystal oscillator has the characteristics of low loss and long life.
Greater stability and reliability
In fact, not only the application of color TV reflects the expansibility of crystal oscillators, but also the application of crystal oscillators can be seen in communication system equipment. All high-performance quartz crystal oscillators will be widely used in communication networks or wireless data transmission and High-speed digital data transmission and other aspects, these can reflect the high scalability and stability of the crystal oscillator.
stable performance
Active crystal oscillators are more stable than passive crystal oscillators, and their accuracy is more accurate than passive crystal oscillators. If the product requires higher precision, an active crystal oscillator can be selected.
Features
1. General-purpose crystal oscillator, used in various circuits to generate oscillation frequency.
2. Narrow the frequency band of the receiver and improve the sensitivity. Its anti-interference ability is improved.
3. Because the crystal oscillator has excellent short-term stability characteristics, it can improve the measurement accuracy of Doppler radar
4. Provide high stability frequency standard and time synchronization signals for radio navigation, measurement and control, phase locking, frequency synthesis and various fine electronic instruments.
5. Quartz crystal oscillators for clocks and watches.