SIT9120AC-2B1-33S133.333330G

Oscillators are electronic frequency-generating devices used to create periodic, oscillating electrical signals. The SIT9120AC-2B1-33S133.333330G oscillator is part of a family of high precision oscillators with a frequency up to 250 MHz based on a Capacitive Oscillator Module (COM).

Application Field

The SIT9120AC-2B1-33S133.333330G oscillator is a frequency-stable solution for applications such as industrial control, communication, instrumentation, and test and measurement. It offers superior performance in cases where minimum phase jitter and low phase noise are important. It also offers excellent jitter performance when used as a reference clock source for applications such as wireless radios, video conferencing, or digital video.

Working Principle

SIT9120AC-2B1-33S133.333330G oscillator is based on a capacitive oscillator module (COM). Rather than using an inductor-based oscillator circuit with an additional frequency-control element such as a crystal or digital PLL, the COM uses only capacitors to build an oscillator circuit. This design offers superior frequency stability, improved phase noise, and excellent close-in phase jitter performance. The COM also offers a wide working frequency range that can be adjusted by changing a single capacitor or resistor, making it easy to adjust the frequency of the oscillator to suit the application.

The COM consists of a simple oscillator circuit design, with two capacitor and one resistor configured to generate a high-frequency, stable signal for the application. The capacitors are temperature-compensated, and the frequency-control resistor ensures that the frequency output is very stable across a wide temperature range. The frequency is determined by the value of the components in the oscillator circuit, and can be adjusted by changing the value of the resistor and/or one of the capacitors.

The COM is also designed to minimize phase noise. The two capacitors are connected in a low-skew configuration to minimize the effect of noise on the output waveform, while the resistor is chosen to reduce the effect of load-dependent voltage droop. The combination of these two features reduces the noise level of the output waveform while maintaining its frequency accuracy.

In addition, the SIT9120AC-2B1-33S133.333330G oscillator is designed to minimize phase jitter. The capacitors are precision matched to maximize accuracy, and the resistor is optimized to reduce the effect of load-dependent voltage droop. This combination of measures ensures that the output waveform is extremely accurate, with minimal jitter and low phase noise.

Conclusion

The SIT9120AC-2B1-33S133.333330G oscillator is an excellent choice for applications requiring high frequency stability and low phase noise. The combination of a simple oscillator circuit design, temperature-compensated capacitors, and a frequency-control resistor ensures that the oscillator offers superior performance in most applications. Additionally, the step-up/step-down frequency adjustment capability makes it easy to adjust for different applications. Finally, the low phase jitter and low phase noise performance make it an ideal choice for applications requiring high precision in the signal.