SIT9005ACU1D-18SE

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Programmable Oscillators refer to oscillators, the frequency of which can be set during the manufacturing process and set to the most suitable frequency for the circuit in which it will be used. SIT9005ACU1D-18SE is one of the programmable oscillators that has wide applications and working principle is based on phase-locked loop (PLL) technique. The following discusses the application field and working principle of SIT9005ACU1D-18SE.

Application Field of SIT9005ACU1D-18SE

SIT9005ACU1D-18SE is mainly used in communication and military fields such as satellite positioning system, inertial navigation system, precision timing application, active antenna radar and others. In communication field, SIT9005ACU1D-18SE is the indispensable core to realize high-precision, high-stability and high-accuracy wireless communication. It is widely used in wireless communication base station, mobile communication base station, wireless wired bridge and wireless mobile communication. In military field, SIT9005ACU1D-18SE is the optimal performance choice for radar scattering radiation, active antenna radar and other high reliability systems. Due to its stable performance and high precision for frequency, SIT9005ACU1D-18SE is capable of ensuring the operation of radar locating system and has the application of frequency hopping and signal jamming.

Working Principle of SIT9005ACU1D-18SE

SIT9005ACU1D-18SE is based on the PLL technique. The working principle of SIT9005ACU1D-18SE consists of several parts, including voltage controlled oscillator (VCO), reference oscillator, phase detector and frequency detector. In an ideal synchronous system without distortion, frequency and phase of the output signal are identical to those of the reference signal. In order to obtain high precision, an anti-distortion circuit is used in the system, which contains an output feedback loop (phase locked loop, PLL).

The PLL circuit consists of a reference oscillator, a VCO, a phase detector and a frequency detector. The reference oscillator is the generator of the standard frequency, the VCO is the generator of the system’s main oscillation signal, and the phase detector and frequency detector are used to compare the phases and frequencies of the reference oscillator and VCO.

The received reference signal is first split into two equal signals (an error signal and a control signal) through a time delay circuit, and then sent to the phase detector and frequency detector, respectively. The phase detector output is applied to the control input of the VCO, thus adjusting the phase differences of the two signals. The frequency detector output is applied to the control input of the VCO, thus changing the frequency of the VCO, thus causing the VCO to operate at the same frequency as the reference oscillator. Finally, the output signal from the VCO is a frequency locked to the reference oscillator.

Advantages of SIT9005ACU1D-18SE

SIT9005ACU1D-18SE has wide application, can be used in communication and military fields. It has high precision and long term stability. Due to the phase-locked loop technique, the output frequency of SIT9005ACU1D-18SE is locked to the reference frequency. Although the VCO has a wide range of frequency and phase error, it can still reduce these errors to a small value. In addition, the tolerance of the output frequency is smaller than that of the traditional passive components and the power consumption is very small. Thus, SIT9005ACU1D-18SE can meet the requirements of most applications.

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