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Oscillators

An oscillator is an electronic device that generates a continuous, repetitive signal. It is a type of closed loop system that uses feedback to generate the signal and the feedback path cycles the signal through the same stages or successive stages multiple times. These signals are used in a variety of electronic systems and often power other components such as amplifiers.

SIT1602BC-13-18S-37.500000D application field and working principle

SIT1602BC-13-18S-37.500000D oscillator is a kind of oscillator which has miniature case size, high frequency, low power consumption and low temperature drift. It is mainly used in the fields of mobile communication, set-top boxes, digital TVs, wireless networks, automotive electronics and etc. It can expand and adjust the frequency range from 10MHz to 800MHz. To work as a clock oscillator, which provides the clock for other electronics devices, such as digital circuit or CPU.

The circuit of the SIT1602BC-13-18S-37.500000D oscillator is composed of three major parts. The first part is the static frequency divider, which is designed for setting the output frequency. It includes the divide-by-one, divide-by-two, divide-by-four and divide-by-eight circuits. The input frequency is determined by the reference frequency and supplemented by the internal frequency divider. The second part is the Temperature Compensated Crystal Oscillator (TCXO). The TCXO is a type of oscillator that uses a temperature-compensated crystal resonator to regulate its own frequency accuracy and offset. It relies on an electronic temperature compensation circuit to make the oscillator accurately tolerate temperature changes. The third part is the voltage-controlled oscillator (VCO), which uses a varactor diode to adjust the frequency of the output signal. The circuit uses the periodically varying capacitance of the diode to change the frequency of the output signal.

The frequency of the output signal is continuously changing based on three fundamental parameters. The first is the frequency of the crystal oscillator. The second is the frequency divider setting. The third is the voltage on the varactor which is driven by the voltage-controlled oscillator. The output frequency can be determined by measuring the actual output and the amount of correction needed to be applied to the output frequency.

In summary, the SIT1602BC-13-18S-37.500000D oscillator is a highly reliable and stable oscillator due to the temperature-compensated crystal oscillator, frequency divider and voltage-controlled oscillator. It is often used for providing the clock signal for other electronic devices, offering high accuracy and wide frequency range.

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