SIT8008BCB3-XXE

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Introduction to Programmable Oscillators

A programmable oscillator is an electronic device that uses a sequence of control signals to oscillate at an adjustable frequency output. Programmable oscillators are used in many different applications, including communications, automotive, medical, audio, and video systems. Their primary advantages are their flexibility and precision, as they can be programmed to provide a range of frequencies with accuracy and stability.

SIT8008BCB3-XXE Application Field and Working Principle

The SIT8008BCB3-XXE is a programmable oscillator configured in a 24-pin, 5mm x 5mm, LCP package. It is a quartz crystal-controlled SMD crystal oscillator that can be programmed with three microprocessor control lines (CONFIG1, CONFIG2, and CONFIG3) to generate frequencies from 100kHz to 250MHz. The SIT8008BCB3-XXE is designed for applications requiring precision frequency control, such as communications systems, cellular base stations, and mobile phones.

The SIT8008BCB3-XXE utilizes a varactor diode for frequency adjustment and a quartz crystal resonator for frequency stability. The varactor diode is a semiconductor device that has a variable capacitive reactance that can be adjusted with a control signal. The quartz crystal resonator is used to ensure precision frequency control. It consists of a crystal mounted between two electrodes and connected to a feedback circuit that amplifies the signal.

The SIT8008BCB3-XXE uses a three-stage PLL circuit to generate its output signal. The first stage is a low-noise VCO that provides an adjustable output frequency. Next, the PLL frequency comparison circuit compares the VCO output frequency to the signal from the quartz crystal resonator and controls the VCO\'s frequency through the varactor diode. Finally, the PLL signal is passed through an amplitude limiter and passed to the SIT8008BCB3-XXE\'s output port.

Conclusion

In conclusion, the SIT8008BCB3-XXE is a precision programmable oscillator that can be used in applications requiring precise frequency control. Its three-stage PLL circuit and quartz crystal resonator ensure precise frequency accuracy and stability. The SIT8008BCB3-XXE is an ideal choice for communications systems, cellular base stations, and mobile phones.

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