Detailed analysis of the crystal oscillator for drones

Lead: In recent years, drones have been all the rage, almost everywhere, professional drone aerial photography companies have emerged in an endless stream, and many traditional film and television companies have also purchased drones and used aerial photography as a business. There is no doubt that the aerial drone provides a difficult angle of shooting in the past, and it is also very economical.

And for a component that must be used on a drone - how many people know about the patch crystal oscillator.

The UAV crystal works in a resonant state with a crystal that converts electrical energy and mechanical energy into each other to provide stable, accurate single-frequency oscillation. Under normal operating conditions, the average crystal frequency is absolutely accurate to 50 parts per million. Advanced precision is higher.

Some crystal oscillators can also be adjusted by a applied voltage within a certain range, called a voltage controlled oscillator (VCXO).

The role of the crystal is to provide the system with a basic clock signal. Usually a system shares a crystal to keep the parts in sync. Some communication systems use different crystals for the fundamental and RF frequencies, and are synchronized by electronically adjusting the frequency.

The crystal is typically used in conjunction with a phase-locked loop circuit to provide the clock frequency required by the system. If different subsystems require clock signals of different frequencies, they can be provided by different phase-locked loops connected to the same crystal.

Frequently used frequencies for UAV crystal oscillators are: 24M, 26M, 48M, and the package is usually selected from: small package size such as 2520.3225.5032.