SIT8208AC-GF-28S-33.333300X

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Oscillators are widely used in many applications such as radio communication and technical analysis. They are capable of creating a regular and constant waveform output, capable of producing a desired frequency and power. One of the such oscillator is SIT8208AC-GF-28S-33.333300X. This article will describe the application fields and working principle of this device.

Application Fields

SIT8208AC-GF-28S-33.333300X is a low phase noise, high stability, quartz based, temperature compensated, voltage controlled oscillator (TCXO). This part is typically used in radio and satellite communication systems. This is because the device uses an adjustable voltage output which provides excellent control over the oscillator\'s center frequency and stability. It also ensures that its frequency can be adjusted in a wide range of applications. The device\'s temperature range is from -40 to +105 °C, which allows it to be used in extreme temperatures. As its voltage and current input andoutput range is from 1.2 to 3.3V and 4mA to 10mA respectively, it is compatible with most electronic devices.

Apart from these applications, this part is also used in the timing and precision components for technical analysis, telecommunications, medical instruments, and various consumer electronics. In addition, this device is also suitable for wireless telemetry, timing circuits, signal processing, and wireless infrastructure.

Working Principle

SIT8208AC-GF-28S-33.333300X is a quartz crystal oscillator, which has a simple and reliable structure. This device is equipped with an AT-cut quartz crystal to provide excellent stability and low phase noise. It consists of an oscillation circuit, which includes an operational amplifier and a quartz crystal connected in the feedback loop. The operational amplifier is used to provide a signal amplification to the oscillator circuit. The voltage applied to the amplifier is regulated by the Output Enable/Voltage Control input, which can be adjusted to change the oscillator\'s output frequency. The power supply voltage should be set within the device\'s operating range which is from 1.2 V to 3.3 V.

Then, the quartz crystal is connected in the feedback loop of the oscillator circuit. The crystal\'s resonant frequency is determined by its size, cut, and load capacitance. The interacting electromagnetic field between the quartz crystal and the inductors produce a resonant frequency which sets the frequency of the oscillator. The load capacitance can be adjusted to fine-tune the frequency. When the negative feedback voltage is equal or greater than the input signal, the amplitude of the signal starts to decrease and the output frequency is then locked in.

Finally, the temperature compensated feature of this device allows it to be used in environments with high temperature variations. The temperature compensation is done by the internal P-type bipolar junction transistor (BJT) which adjusts the frequency upon sensing temperature change. This temperature-compensated feature makes sure the oscillator\'s frequency is not affected by high temperature changes.

In conclusion, SIT8208AC-GF-28S-33.333300X is a low phase noise, high stability, quartz based, temperature compensated, voltage controlled oscillator (TCXO). This oscillator is suitable for a wide range of radio and satellite communication systems, precision components, and other consumer electronics. Its temperature compensated feature makes sure that the frequency does not change with high temperature variation providing excellent stability.

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