CAR3101A16S-1SW

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Miscellaneous is the collective name of a variety of technologies and products, including the application field and working principle of CAR3101A16S-1SW.

CAR3101A16S-1SW is a miniaturized GPS L1 frequency band frequency synthesizer. Its working frequency point of GPS is 1575.42MHz. The output frequency of CAR3101A16S-1SW is accurate and stable, and its phase noise is low. It is suitable for various applications, such as GPS navigation, instrumentation, communications, test and measurement, etc.

The design principle of CAR3101A16S-1SW is to migrate a frequency synthesizer based on multiple loop technology. The main purpose is to track and lock the frequency of GPS satellites and accurately output the required frequency signals. The Phase Locked Loop (PLL) technology is adopted as the basic design principle of the related frequency synthesizer. A PLL is a closed-loop system for controlling frequency, consisting of a Voltage Controlled Oscillator (VCO), phase detector (PD), loop filter, reference frequency (REF) divider, and a digitally controlled tuning word register.

The reference frequency is first applied to the frequency divider, and then it is applied to the phase detector for comparison with the phase signal output to it by the VCO. When the frequency output by the VCO is higher than the frequency of the reference, the output of the phase detector will be a positive voltage. When the output frequency of the VCO is lower than the reference frequency, the output of the phase detector will be a negative voltage. According to the size of the voltage difference, the VCO frequency will gradually shift and eventually reach the correct frequency.

When the output of the VCO has reached the reference frequency, the phase detector will make the output voltage become a small dc correct voltage, and the small dc correction voltage will be applied to the VCO through the loop filter, in order to ensure that it maintains the working frequency that is the same as the reference frequency.

The PLL is also equipped with additional circuits, such as the charge pump circuit and the charge control circuit, which are used to optimize the loop characteristics and improve the locking range and time. This make it possible for CAR3101A16S-1SW to quickly track and capture the GPS satellite. In addition, it also has a rich set of digital functions, which can be used to improve the output signals.

In conclusion, the CAR3101A16S-1SW frequency synthesizer has many applications in various fields, such as GPS navigation, instrumentation, communications, test and measurement, etc. Its design principle is to use the PLL technology to accurately output the required frequency signal of GPS. It also has additional circuits to optimize the output signal, improve the locking range and time.

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