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Oscillators

Oscillators, also known as oscillating circuits, are components of electronic systems that generate an alternating voltage or current signal. They are used widely in modern electronic circuits, where they are used to provide a stable output frequency for logic circuits and other digital systems, as well as to provide a basic timing signal.
SIT8208AC-GF-18S-50.000000X is a specially developed oscillator with integrated crystal and voltage-controlled crystal oscillator (VCXO) technology, with the advantage of low cost and high stability. It is designed to meet the most demanding requirements of today’s wireless, digital, and mixed-signal products. This oscillator operates at a frequency of 50 MHz, with typical jitter of 0.45 ps over a temperature range from 0°C to 70°C. It also features an ultra-wide operating voltage range of 1.2V to 3.6V, and can operate at frequencies up to 150MHz.

SIT8208AC-GF-18S-50.000000X is suitable for various applications such as cellular base stations, Wi-Fi routers, GPS receivers, optical communication systems, consumer electronics, vehicular electronics, and MEMS sensor modules. It can also be used in other applications involving high precision frequency control.

Working Principle

SIT8208AC-GF-18S-50.000000X operates using a fundamental principal known as the phase-locked loop (PLL). This is a circuit consisting of three main components – the phase detector (PD), the charge pump (CP) and the voltage-controlled oscillator (VCO), as well as a feedback loop that connects the output of the VCO to the input of the PD. The Phase detector compares the phase of the generated signal to the reference signal, and the charge pump adjusts the output of the VCO accordingly until the phases match, producing an output with the required frequency. In other words, the PLL phase locks the VCO to the reference signal and keeps it there.

The SIT8208AC-GF-18S-50.000000X also includes some other key features that enhance its performance and reliability. These include a monitor circuit, an oscillator start up circuit, and a reference oscillator circuit, all contained on the same module. The monitor circuit constantly monitors the output of the VCO to ensure that the device is operating correctly, while the oscillator start-up circuit ensures that the device is always in the correct operating state during power-up or transitions between different frequencies. Lastly, the reference oscillator circuit helps to provide a stable reference signal for the PLL.

Conclusion

SIT8208AC-GF-18S-50.000000X is a highly reliable and cost-effective oscillator designed for a wide variety of applications. It uses a PLL phase-locked loop to keep its output frequency perfectly matched to the input reference signal, and features additional components to help improve start-up behavior and output reliability. With its wide frequency range and low jitter, it is an ideal choice for many digital, wireless, and consumer electronics applications.

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