SIT9003AI-3-18EO

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Programmable oscillators are electronic components that have oscillation characteristics that are adjustable outside the factory. They have the advantages of small size, high frequency, wide range of frequency, low phase noise and low cost. SIT9003AI-3-18EO is one of the programmable oscillators. SIT9003AI-3-18EO has multiple frequency ranges in one package: 25MHz-3.4GHz and 0.8GHz-2.6GHz, meeting the needs of many applications. This article discusses the applications of SIT9003AI-3-18EO and the working principles of programmable oscillators.

Application Fields of SIT9003AI-3-18EO

The application scope of SIT9003AI-3-18EO is very wide. It can be used in many fields, such as microwave (including satellite communication receivers, industrial instrumentation, frequency control and monitoring, and electronic jamming etc.), consumer electronics (including electronic amplifier and audio frequency control circut), telecom (including air/land GSM, CDMA, WCDMA, WiMAX, and satellite communication transceiver) and aerospace, etc. Its high precision (±1 ppm frequency accuracy), wide frequency range (25MHz-3.4GHz), small size (6mmx 7mmx 1.75mm) and low cost (1.0-1.8 $\$$ per unit ) makes SIT9003AI-3-18EO suitable for various applications.

Working Principles of Programmable Oscillators

The working principle of a programmable oscillator is that an external control circuit provides a certain frequency characteristics to the oscillator, thus changing the oscillation frequency. The programmable oscillator usually consists of a voltage-controlled oscillator (VCO) and a circuit to adjust the oscillation frequency. The VCO is connected to a control circuit that utilizes a phase-locked loop to supply the oscillator with an informational feedback from the desired frequency. The frequency adjustment system can be either digital or analog.

For a digital frequency adjustment system, the circuit can adjust the oscillation frequency by changing the capacitance of a VCO. It operates by feeding a digital signal to a digital-to-analogue converter. The analogue signal from the converter can control the capacitance. The capacitance will be changed continuously until the oscillation frequency matches the desired frequency. For an analogue frequency adjustment system, a VCO with a linear frequency control characteristics is used. The control signal changes the magnitude of the voltage and the VCO sets the frequency accordingly. Therefore, the frequency adjustment system adjusts the frequency of the oscillator. The frequency adjustment system can be adjusted remotely, thus making it easier to adjust the oscillation frequency.

Conclusion

Programmable oscillators are components that have adjustable frequency control, and can be applied in various applications. SIT9003AI-3-18EO is one of the most commonly used programmable oscillator due to its wide frequency range and precision, and its small size and low cost. The application scope of SIT9003AI-3-18EO covers microwave, consumer electronics, telecom and aerospace etc. Its frequency can be adjusted remotely by utilizing digital and analog frequency adjustment systems. Therefore, SIT9003AI-3-18EO can be utilized in multiple applications with its many advantages.

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