XLH736011.289600X

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Oscillators

Oscillators are essential components used for many electronic and communication applications. One kind of oscillators is XLH736011.289600X oscillator, a frequency synthesizer module utilized in communication systems. This article gives an overview of the application field and working principle of the XLH736011.289600X oscillator.

Application Fields

The XLH736011.289600X oscillator is mainly used in GSM/CDMA2K/EDGE/3G modules. It was especially designed for use in the TD-SCDMA/HSDPA channel synthesizers, providing extremely accurate frequency control and wide frequency range. It also can be used in various communications, digital transmission systems, digital media systems and other related applications.

Working Principle

XLH736011.289600X oscillator contains a quartz crystal resonator and a phase-locked loop (PLL) frequency synthesizer. The quartz crystal resonator is employed to maintain the stability of the oscillator frequency, and the PLL frequency synthesizer is employed for accurate frequency control. The microwave frequency signal is output directly from the output port, and the signal can be adjusted by the tuning voltage. The working frequency range is 1.2GHz~2.9GHz.

The output frequency of this oscillator is generated by the multiplication of two separate signals, a reference signal and a tuning voltage. The reference signal is generated by the quartz crystal resonator, and the frequency of the reference signal is determined by the quartz crystal selection. The tuning voltage is generated by the voltage-controlled oscillator (VCO) in the PLL frequency synthesizer. When the tuning voltage is changed, the output frequency of the VCO is changed correspondingly, resulting in corresponding changes in the output frequency of the oscillator. This way, the frequency of the output signal can be precisely and rapidly controlled in a wide frequency range.

In addition, the oscillator also contains several control loops to ensure the stability and accuracy of the output frequency. The feedback loop of the VCO is used to correct and control the change of the output frequency due to the influence of parameters drift. Moreover, the temperature control circuit can be used to compensate for the influence of temperature changes on the frequency stability. In this way, the output signal can be kept stable and accurate.

Conclusion

XLH736011.289600X oscillator is widely used in communication systems such as GSM/CDMA2K/EDGE. Its output frequency is generated by the combination of the quartz crystal resonance and a PLL frequency synthesizer. With the help of the feedback loop of the voltage-controlled oscillator and the temperature control circuit, it can maintain good frequency stability and accuracy over a wide frequency range.

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