SIT8208AC-8F-33E-33.868800Y

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Oscillators

Oscillators are devices that produce a repetitive output waveform and usually have an output frequency (or set of frequencies) different from the one applied as input. This output frequency is determined by the characteristics of the components used in the oscillator circuit and the type of oscillator will vary according to the specific application.

SIT8208AC-8F-33E-33.868800Y application field and working principle

SIT8208AC-8F-33E-33.868800Y is mainly used in high-precision positioning applications. It is an oscillator with a frequency of 33.868800MHz and a small-sized package. It also provides high stability and low phase noise. Its performance has been optimized to meet high frequency accuracy requirements and its stability requirements stretch down up to several years.

The oscillator is designed to operate in an amplifier feedback loop. The oscillator generates a signal of a specific frequency, which is then fed back to the input of the amplifier, forming a closed loop. As the input of the amplifier is the oscillator’s output, the lack of exact output frequency will result in an oscillation of the amplifier input, thus creating the actual output frequency. This feedback theory allows oscillators to operate in different modes, such as sine, square and sawtooth waveforms.

The SIT8208AC-8F-33E-33.868800Y oscillator is based on the fundamental oscillator circuit. It is an LC oscillator which uses a combination of an inductor and capacitor to produce an oscillating signal. The frequency of the oscillation- is determined by the values of the inductor and capacitor.

The oscillator is made up of a number of circuit elements arranged in a single amplifier configuration, which include a bias circuit, an RF amplifier, a timing-control circuit, an active (bi-polar) RC filter and a VCXO or VCOS control circuit. The bias circuit ensures correct current bias settings, whereas the RF amplifier amplifies the signal. The timing-control circuit monitors the oscillator frequency and corrects any frequency changes by altering the capacitance of the capacitor in the oscillator circuit.

The active RC filter is used to reduce spurious signals causing noise in the signal, while the VCXO or VCOS control circuit allows the operator to fine-tune the frequency of the oscillator by means of an external voltage. This is done in order to provide an exact output frequency as required by the specific application.

The SIT8208AC-8F-33E-33.868800Y oscillator has been designed to provide very precise, frequency control stable and long-term stability over temperatures. It can be used in various applications, including telecommunications infrastructure, navigation and timing systems, medical equipment and satellite transponders. It is also suitable for use in digital land-mobile, GPS applications and local area networks.

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