579R100IAT Crystals, Oscillators, Resonators

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Introduction

The 579R100IAT is an oscillator in the Oscillators category. It is a two stage oscillator that uses an RC network as the feedback tank in order to maintain the oscillations. This oscillator has been designed for use in applications that require a high frequency signal with tight tolerance over temperature. These applications would include cellular radios, digital communication systems, instrumentation, and radars. In addition, the 579R100IAT is suitable for use with digital logic families that are compatible with a 3.3V supply.

Design

The 579R100IAT consists of a series of components that are connected in a special manner to produce an oscillating output signal. At the core of the circuit is an amplifier with over-compensation. The amplifier is paired with a series of filters. The over-compensation keeps the output signal stable even as the temperature changes.

The amplifier requires a certain amount of input power, which is provided by two MOSFETs. These two MOSFETs are connected to a resistor-capacitor (RC) network, which acts as a feedback loop to prevent the amplifier from amplifying the signal disproportionately. This type of RC oscillator produces an output signal at the resonant frequency of the network. This is done by cycling between the charging and discharging phases of the RC circuit.

Additionally, the 579R100IAT features an external frequency trimming option. This feature is used to adjust the output frequency of the oscillator, with a resolution of ±50 ppm. This allows the user to control the frequency of the oscillator with a very high degree of accuracy.

Application Field and Working Principle

The 579R100IAT is suitable for applications requiring a stable oscillator with a wide frequency range. This could include communication systems, instrumentation, radars, and cellular radios. This range can be adjusted using the frequency trimming option, allowing it to be used for any number of applications.

The oscillator works by cycling between the charging and discharging phases of the RC circuit. This creates a sine-wave signal with a frequency determined by the time constant of the circuit. The amplifier produces gains in order to ensure that the signal is amplified enough to be useful. The RC network also serves as a feedback loop, which helps to keep the gain constant even as the temperature changes.

Conclusion

The 579R100IAT is an oscillator with a wide frequency range suitable for multiple applications. It uses an RC network as the feedback loop and works by cycling between the charging and discharging phases of the RC circuit. It is a robust and versatile oscillator that provides a stable signal with very tight tolerance over temperature. It is thus an ideal choice for many different applications.

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