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Resonators

Resonators are often used in electronic components, communication equipment or frequency control devices. This article intends to explain the application field and working principle of one specific type - ECS-SR3-20.00-B resonator.

Application Field

An ECS-SR3-20.00-B resonator is a low frequency crystal oscillator with a frequency range from 16.384 kHz to 20.000 kHz, and offers an excellent frequency stability (`3ppm @ 25ºC). Therefore, it has a wide range of applications, such as in TV games, quartz display clocks, radio control transmitters and receivers, irrigation controllers, asset trackers, and GPS systems.

Working Principle

The ECS-SR3-20.00-B resonator is based on the oscillation of quartz crystals. It can be described as an undersized version of the quartz crystal oscillator. When a quartz crystal is energized, the negative terminal is connected to the crystal and the positive terminal is connected to the ground, which forces the crystal become a part of a simple circuit. The electrical charge which is stored in the crystal can vibrate the quartz at a certain frequency. Then, this vibration energy is transformed into oscillating energy and amplified. This cycle continues until all the energy is used up, and the quartz crystal will die.

In an ECS-SR3-20.00-B resonator, the resonant frequency is determined by the thickness and size of the crystal as well as the capacity of the electrodes. The oscillation of the quartz crystal is monitored by the circuit and the signal is then stabilized and output.

Conclusion

By using an ECS-SR3-20.00-B resonator, the frequency range is extended and the frequency stability is greatly improved. This resonator thus offers a cost-effective solution for many product applications, from TV games to wireless devices.

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