SIT1602BI-72-XXE-8.192000D

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Oscillators are electronic circuits that generate a periodic and typically a sinusoidal output signals. There are many different types of oscillators, with the most common being the SIT1602BI-72-XXE-8.192000D, used for a wide range of applications.

SIT1602BI-72-XXE-8.192000D Application Field

Unlike other VCOs, the SIT1602BI-72-XXE-8.192000D oscillator has been specifically designed to operate in a very wide frequency range, from 8MHz to maizimally 19.2GHz. Owing to its high frequency range and versatile outputs, it can be used in various applications, ranging from wireless communications, radar to military navigation systems. The device also offers high linearity, low phase noise and excellent spurious suppression.

For example, it is used in802.11a/b/g wireless LAN systems and cellular base station radios. Furthermore, its low power consumption and high output power makes it suitable for various portable applications, such as 802.11a/b/g/n wireless handhelds and pagers. Moreover, the SIT1602BI-72-XXE-8.192000D oscillator is also used in point-to-point microwave radios, satellite communications systems,and global navigation systems.

Working Principle

The SIT1602BI-72-XXE-8.192000D oscillator is a voltage-controlled oscillator (VCO) that uses a pair of P-channel FETs with serially connected inductors to form a tank circuit. The P-channel FET is biased to the switching voltage using a tapped resistor-capacitor (RC) network. The frequency is adjusted by changing the voltage applied to the gate of the active transistor. The connection shown in theFigure 1 is a sample SIT1602BI-72-XXE-8.192000D oscillator.

Figure 1: SIT1602BI-72-XXE-8.192000D oscillator circuit construction

When the supply voltage is applied to the VCO, both FETs are biased to the switching voltage. This causes current flow through the inductor and the FETs, resulting in the voltage across the inductor both rising and falling. When the inductor voltage exceeds that of the FET, the FET will turn off, causing the inductor to discharge until the FETs turn back on. This forms an oscillation that is constant in period.

Because the SIT1602BI-72-XXE-8.192000D oscillator uses two channels, the effects of temperature variations, supply voltage fluctuations and other ambient effects are greatly minimized. As a result, the oscillator is highly stable and has excellent linearity.

Conclusion

The SIT1602BI-72-XXE-8.192000D oscillator offers exceptionally precise frequency control and low phase noise. It is suitable for a wide variety of applications, ranging from wireless communications, radar to military navigation systems. Owing to its wide frequency domain, high linearity and excellent spurious suppression, this oscillator is considered one of the most reliable VCOs available.

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