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Oscillators

SIT 9120AI-2D2-XXE106.250000T application field and working principle

The SIT 9120AI-2D2-XXE106.250000T is a voltage controlled temperature compensated crystal oscillator (VCTCXO). Its application field can be summarized into the following four areas: it is used as a reference frequency source for phase locked loops (PLLs), frequency synthesizers, and integrated circuits; it is utilized for clock servers, video equipment, wireless equipment, communication links, and embedded systems; it is widely applied in systems for frequency tuning; and it is applied for test and measurement, telecom/datacom, medical, and aviation electronics.

The working principle of the SIT 9120AI-2D2-XXE106.250000T is based on a voltage controlled quartz tuning fork that is temperature compensated in order to maintain precise frequency stability. This is achieved by combining two resonators in one single package. The first resonator is the quartz oscillator tuned by the current through an external resistor. The second resonator is a thermistor stage that provides the temperature compensation protecting the crystal oscillator from frequency drift caused by ambient temperature changes. A voltage input is applied to the thermistor to adjust the range of temperature compensation. The range of the compensation accuracy is from -30 ppm to +50 ppm.

The SIT 9120AI-2D2-XXE106.250000T can also be used for frequency tuning thanks to its frequency pulling capability. Its output frequency can be adjusted manually by using an external transformer, variable power supply, or other type of tuning device. The tuning range can be from 10 kHz to 1 MHz, depending on the type of oscillator employed. It can also be adjusted remotely by means of a simple digital interface. This kind of frequency control allows the SIT 9120AI-2D2-XXE106.250000T to be implemented in systems that require frequent frequency tuning.

In conclusion, the SIT 9120AI-2D2-XXE106.250000T is a voltage controlled crystal oscillator that offers a wide range of application possibilities due to its frequency stability, precision, and temperature compensation features. Its robust construction and versatile tuning capabilities make it suitable for a wide variety of applications such as frequency generators, frequency synthesisers, frequency reference sources, clock servers, and many others.

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