SIT8209AC-3F-28S-150.000000Y

Oscillators

The SIT8209AC-3F-28S-150.000000Y is an oscillator type device that is used to produce periodic electrical signals. It is a monolithic integrated circuit (IC) constructed out of primarily CMOS technology. The output frequency of the oscillator can be adjusted by introducing an external capacitor to the oscillator circuit. The oscillator can be configured to produce either sine waves or square waves with frequencies ranging from 1Hz to over 150MHz.

Application Field

This oscillator is mainly used in communication systems. It is employed in the design of local oscillator circuits for television and radio transmitters and receivers. It can also be used for frequency synthesis in radio communication, positioning and navigation systems. The device can provide a low-cost, low power and low phase noise solution for radio signals. It is also used to generate signals of required frequencies in the electrical engineering laboratory for measurement and calibration purposes.

Working Principle

The oscillator is based on an LC oscillator circuit. It consists of an inductor (L) and a capacitor (C) connected in series. As current passes through the LC circuit, it is filtered and amplified with the help of the electronic circuit components within the IC. The capacitance of the capacitor determines the frequency of oscillation and the inductance of the inductor determines the amplitude of the oscillation. The combination of capacitance and inductance determines the Q factor of the oscillator – a measure of the resonance of the circuit.

The frequency of the output signal is determined by the oscillator circuit due to the effect of negative feedback. The output signal is taken from the amplifier and fed back into the oscillator circuit. This feedback loop prevents the system from entering into a state of continuous oscillation, intensifying the output frequency and maintaining the oscillator\'s stability.

The output frequency accuracy is determined by the accuracy of the external components used to tune the frequency of the oscillator. Moreover, the device has a few additional features designed to increase its accuracy and maintain its stability. These include an internal reference frequency counter to calibrate the output frequency and temperature compensation circuits to prevent changes in the oscillator frequency over varying temperatures.