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Programmable Oscillators

Introduction
Programmable Oscillators are one of the most common and important type of oscillator in modern electronics industry. These oscillators are designed to generate a stable frequency output, usually with a range of frequencies, depending on the application. The most basic type of oscillator is a sinusoidal or harmonic oscillator, which produces alternating current (AC) signals at a specific frequency, but programmable oscillators allow for the selection of a wide range of frequencies to suit the requirements of a particular application.

SIT9005ACR1G-18EH Application Field and Working Principle
The SIT9005ACR1G-18EH is a programmable oscillator manufactured by Symmetric Technologies, Inc. The SIT9005ACR1G-18EH has a nominal center frequency of 18MHz, but can be programmed to run at various frequencies in the range of 6MHz to 18MHz. It is designed for use in a wide range of applications, including medical imaging systems, GPS receivers, microwave communications systems, and other applications that require a high level of accuracy and reliability.

The SIT9005ACR1G-18EH utilizes a CMOS voltage-controlled oscillator (VCO) design, which allows for an extended range of frequencies. The oscillator consists of two main components: an input circuit and an output circuit. The input circuit provides an input voltage at a fixed frequency to the VCO, while the output circuit utilizes a tuned resonator to produce a highly accurate frequency output. The frequency is selected by programming the VCO voltage to the desired value.

The SIT9005ACR1G-18EH also includes a microprocessor for added convenience. This microprocessor allows the user to program the VCO voltage to a specific frequency, as well as to monitor and adjust the frequency output. The device also has a power-down mode, which can be used to reduce power consumption when the device is not in use. This feature helps to maximize battery life, while still providing high levels of accuracy and reliability.

In addition to its programmability features, the SIT9005ACR1G-18EH also offers superior jitter performance. This is particularly important for applications that require high accuracy and reliability of the timing signals. Furthermore, the device has excellent noise performance, providing a very clean output signal. This ensures that the signal integrity is maintained across a wide range of frequencies.

The SIT9005ACR1G-18EH is also a RoHS-compliant device, meaning that it is free from hazardous materials and complies with the European Union’s Restriction of Hazardous Substances (RoHS) regulation. This makes the device suitable for use in a variety of applications, including those that require high safety standards.

Conclusion
The SIT9005ACR1G-18EH is a highly programmable oscillator designed to generate a wide range of frequencies with superior jitter performance and noise performance. It is particularly suitable for applications that require a high level of accuracy and reliability and can be used in a variety of applications, such as medical imaging systems, GPS receivers, and microwave communications systems. Furthermore, the device is RoHS-compliant, making it safe for use in a variety of applications.

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