SIT8208AI-21-28E-75.000000T

Oscillators

Oscillators are small, compact devices that are used to generate a clean, consistent waveform of voltage or current over time. They consist of circuits with carefully balanced components, such as transistors, inductors, and capacitors, which oscillate at a given frequency. Essentially, an oscillator is designed to combine a power supply and an output signal, to create a low-power output signal at a certain frequency.

One type of oscillator is the SIT8208AI-21-28E-75.000000T. This oscillator is a thermally stable voltage controlled crystal oscillator (VCXO) that covers the frequency range from 21.8 MHz to 28 MHz with a temperature stability of 0.75 ppm (or 0.75 x 10-6).

Application Field

SIT8208AI-21-28E-75.000000T is designed to be used in a wide range of applications, such as communications systems, antennas, sound cards, and baseband processing. It is also used in portable and handheld devices, wireless communication and navigation systems, military applications, satellite communications, and in computer and network communication systems. In terms of wireless communication applications, the SIT8208AI-21-28E-75.000000T is mainly used in GSM, Wi-Fi, Bluetooth, and GPS systems. In terms of baseband processing, this oscillator is used for frequency synthesis and modulation.

Working Principle

The SIT8208AI-21-28E-75.000000T oscillator makes use of the Piezoelectric Effect, which is the ability of certain crystals to generate a voltage when subjected to mechanical strain. The oscillator consists of a piezoelectric crystal, a temperature compensated amplifier, and a field effect transistor (FET). The crystal is connected to the FET and the temperature compensated amplifier, which amplifies the voltage output of the crystal.

This voltage is then used to drive the FET, which controls the frequency at which the crystal oscillates. The FET changes the capacitance in the oscillator circuit, which in turn controls the frequency. The temperature compensated amplifier monitors the output of the FET and adjusts the gain in order to maintain a steady output voltage.

This type of oscillator is thermally stable and highly accurate, making it ideal for use in communication and navigation systems. The temperature stability of the SIT8208AI-21-28E-75.000000T oscillator allows it to maintain such a high precision over a wide range of temperatures.