SIT9002AI-13N25SD

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Programmable Oscillators

Programmable Oscillators, otherwise known as Phase-Locked Loop (PLL), are widely used in various fields. It mainly consists of a loop filter, a voltage-controlled oscillator (VCO) and a programmable divider. The PLL provides an output signal whose frequency is a fraction of the input signal frequency.

The SIT9002AI-13N25SD series of programmable oscillators is a two-stage device that utilizes an oscillator frequency as the primary controlled frequency and a programmable frequency as the secondary controlled frequency. Its programmable frequency can be set by a set of pins, and the frequency accuracy is typically ±1.5 ppm. Its features make it widely used in digital communication systems, such as personal digital assistant (PDA), mobile phone, satellite communication systems, wireless local area networks and short range devices.

The working principle of SIT9002AI-13N25SD programmable oscillators is based on the use of a programmable frequency divider and a phase detector. The phase detector compares the phase of the oscillator output with a reference voltage and then output a control voltage to the VCO. The phase of the VCO is then adjusted to match the phase of the reference voltage. In addition, the programmable frequency divider divides the frequency of the oscillator output to generate a programmable frequency, which is sent to the phase detector and then the phase detector compares it with the reference voltage. The output of the phase detector is then used to adjust the frequency of the VCO.

In summary, SIT9002AI-13N25SD programmable oscillators are widely used in various fields. The device is composed of a phase detector, a VCO and a programmable frequency divider. The working principle is based on the comparison of the phase of the oscillator output with the reference voltage and the adjustment of the frequency according to the output of the phase detector. This device is particularly suitable for mobile phones, digital communication systems, wireless local area networks and short range devices due to its excellent performance and wide frequency range.

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