SIT9120AC-1B3-33E25.000000T

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Oscillators are devices which use the electrical or electromagnetic signal to generate an oscillating waveform, usually sine waves or square waves, using feedback processes. SIT9120AC-1B3-33E25.000000T is a type of oscillator which designs and produced to be used in a wide range of applications. This paper will aim to explore the application field and working principle of this device.

Application Field

SIT9120AC-1B3-33E25.000000T is a temperature compensated crystal oscillator (TCXO) designed and manufactured by SITech Company. It is specifically designed to produce a stable high-frequency signal as reference to other high-precision electronic systems, such as:

• Military and Aerospace applications interested in high stability oscillators.
• QoS time-critical services for telecommunications.
• High-precision missions like GPS systems.
• High-precision calibration systems.

Moreover, the SIT9120AC-1B3-33E25.000000T is internally temperature compensated over a -40°C to +85°C temperature range by the use of an integrated analog temperature sensor and an active filter section. In addition, this TCXO can reach an even lower stability in terms of frequency over time in environments where temperature is more stable than the expected range. This includes spaceships and satellites orbiting in surrounding vacuum.

Design and Working Principle

The SIT9120AC-1B3-33E25.000000T is a surface mount oscillator, available in +3.3V TT or full-scale technology. The oscillator is made up by a crystal resonator enclosed in an electronic component package. Inside the component there is also an onboard programmable logic device (PLD) which modulates the frequency of the device while it is in working conditions.

The frequency of the device is generated by an oscillation process. This consists on an oscillator core, the crystal resonator and the PLD device, creating a feedback loop. The oscillator core is made by a transistor connected in a push and pull configuration, which produces an alternating current pulse. This pulse is passed through an amplifier and then through the crystal resonator.

The frequency of the oscillator is precisely determined by the natural resonant frequency of the quartz crystal resonator. The quartz crystal alters the electrical characteristics of the feedback stage of the oscillator, generating a sine wave whose frequency depends on its cut-off frequency. The output signal of the quartz is then modulated by the PLD implementing an active filter to attain the stability that the device require.

Conclusion

SIT9120AC-1B3-33E25.000000T stands as a great application of technology in the oscillators field. It has wide range of applications in high-precision missions, such as the ones used in aerospace and military applications. Its dynamic and knowledge engineering design, combined with its surface mount technology, make it a great bid for any oscillator solution that requires high stability.

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