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Oscillators

Oscillator is an electronic circuit component that can generate a continuous, repetitive, periodic waveform. It generally consists of an amplifier and a frequency determining network. Oscillators have been widely used in various fields such as wireless communication, power supply, and so on. Among them, SIT8209AC-3F-28E-106.250000X is one of the most commonly used oscillators.

SIT8209AC-3F-28E-106.250000X Application Field

The SIT8209AC-3F-28E-106.250000X is a high precision and stable oscillator. Its main function is to generate a periodic waveform with a unidirectional or bidirectional (variable) frequency. Its output signal can range from 106.25-106.35MHz. In addition, the SIT8209AC-3F-28E-106.250000X offers a very low distortion signal. Therefore, this oscillator is often used in applications such as wireless communications, broadcasting, and optical communications.

Working Principle

The SIT8209AC-3F-28E-106.250000X oscillator uses a Pierce oscillator circuit structure. The circuit consists of an amplifier and a frequency determining network. The amplifier in this oscillator is an operational amplifier, and the frequency determining network is a parallel RC network with two feedback branches. The output level control circuit switches resistors on the feedback branch to change the feedback gain. The input signal of the oscillator is applied by the capacitor to the base of the transistor, and the feedback signal is f fed into the emitter of the transistor.

In the Pierce oscillator circuit, the amplifier amplifies the input signal and drives the signal into the feedback branch, which determines the frequency of the output oscillator signal. Since the feedback branch has a low impedance, the capacitor of the feedback branch does not act as a coupling capacitor, and the current gain of the operational amplifier is almost equal to the voltage gain. This makes the output frequency almost equal to the resonant frequency of the frequency determining network. The feedback signal generated by the feedback branch can be both positive and negative, thus ensuring the bidirectional frequency control range.

Conclusion

The SIT8209AC-3F-28E-106.250000X is a high precision and stable oscillator, which is often used in applications such as wireless communications, broadcasting, and optical communications. Its oscillator circuit structure is the Pierce oscillator, which consists of an amplifier and a frequency determining network. The output frequency of this oscillator is determined by the resonant frequency of the frequency determining network. It can generate an output signal with unidirectional or bidirectional (variable) frequency range with very low distortion level.

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