AX7PBF4-250.0000C

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Oscillators are devices that are designed to produce and regulate a repetitive, or cyclical, signal. As such, they are ubiquitous in virtually all areas of electronic sensing and control. Oscillator technologies range from simple, passive constructs to complex, active arrangements. In this article, we will focus on one particular oscillator, the AX7PBF4-250.0000C, and elucidate its specific application field and working principle.

The AX7PBF4-250.0000C is a miniature voltage control crystal oscillator (VCXO) that is capable of operating between 20MHz and 250MHz. It is designed to be incorporated into high frequency radio communication systems, computers, and digital data receivers. The small package size (7 x 5 x 1.5 mm) makes the UHVCXO suitable for applications where space is at a premium.

The working principle of the AX7PBF4-250.0000C is based on the piezoelectric effect. The oscillator is composed of a quartz crystal resonator, an amplifier, and an associated frequency control circuit. A quartz crystal must be activated to induce an oscillating voltage, which is then amplified and sent through the associated frequency control circuit. This control circuit is designed to offer a wide range of adjustable frequencies within the specified range. This allows users to adjust the frequency as needed for a specific application.

The quartz crystal resonator is an acoustic resonator composed of a thin disc-shaped quartz crystal that is subjected to an alternating electric field. This electric field induces an oscillating charge on the crystal, leading to mechanical vibrations. The frequency of these vibrations is determined by the quartz\'s thickness, electrical properties, and size. The amplifier amplifies the oscillating signal produced by the crystal and passes it on to the frequency control circuit.

The frequency control circuit is the most important part of the oscillator. It is usually implemented using a digital-to-analog converter (DAC) and a voltage-to-frequency converter (VFC). The DAC is used to adjust the voltage level of the oscillator’s output signal, while the VFC converts the adjustable voltage signal into the desired frequency. Together they enable the oscillator to produce a wide range of output frequencies within the desired range.

In conclusion, the AX7PBF4-250.0000C is a miniature voltage control crystal oscillator designed for use in high frequency radio communication systems, computers, and digital data receivers. It exhibits considerable frequency flexibility courtesy of the piezoelectric effect-based quartz crystal resonator, amplifier, and frequency control circuit. As such, it has established itself in the incumbent market of oscillators.

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