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Oscillators

An oscillator is a circuit or electronic device that is mainly used to generate repetitive electronic signal at a certain frequency or frequency range. As an important component in the circuits related to signal transmission and processing, it has important applications in many fields. The commonly used oscillator products include quartz oscillators, silicon oscillators, MEMS resonators, and temperature compensated crystal oscillators. Among these, the 353WB6A184T is a standard temperature compensated crystal oscillator (TCXO) based on a quartz crystal.

353WB6A184T application Field

The 353WB6A184T is a common TCXO with full frequency coverage up to 50MHz. The TCXO achieves fast start-up time and better stability than traditional quartz crystal oscillators, and is mainly used in communication products with higher requirements on frequency stability and environmental conditions. It is especially suitable for signal transmission and processing applications requiring high precision, high stability and wide temperature range. Such applications include aircraft avionics, mobile base stations, precision instrumentation, automotive telecommunication, space, satellite communications.

353WB6A184T Working Principle

The 353WB6A184T is a temperature compensated quartz oscillator. It is composed of quartz crystal oscillator, temperature sensor, voltage controlled oscillator and signal output circuit. In order to reduce the temperature drift of quartz crystal oscillator, a temperature sensor is added to the oscillator loop at the most sensitive temperature point of the oscillator. The oscillator loop is composed of quartz crystal oscillator and voltage controlled oscillator. The frequency of the voltage-controlled oscillator can be adjusted to compensate for the temperature drift of the quartz crystal oscillator. The signal output circuit samples the input signal and sends out the output signal.

When the crystal is affected by temperature, the frequency will change. The temperature sensor will sense the temperature change and feed back the temperature data to the temperature control circuit. Then the temperature control circuit will adjust the output frequency of voltage controlled oscillator according to the temperature data and compensate the drift of quartz crystal oscillator, so that the output frequency of the crystal oscillator can reach the required frequency stability.

Conclusion

The 353WB6A184T is a temperature compensated crystal oscillator mainly used in communication products with higher requirements for frequency stability and environmental conditions. Its working principle is that the temperature sensor is used to sense the temperature drift and the voltage controlled oscillator is used to compensate the frequency drift of the quartz crystal oscillator, so that the output frequency of crystal oscillator can reach the required frequency stability.

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