SIT9121AI-1D3-33E159.375000T

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Oscillators

Oscillators are electronic circuits that produce a steady, periodic signal. They are used to generate timing signals, carrier frequencies for radio transmitters, and a variety of other non-obvious applications. Oscillators are usually specified by their frequency and two additional performance parameters that affect their operation. These two parameters are extermal circuit components and feedback.

SIT9121AI-1D3-33E159.375000T Application Field and Working Principle

The SIT9121AI-1D3-33E159.375000T is a multi-purpose oscillator in the family of frequency control devices. It incorporates a patented technique for temperature compensating oscillators with CMOS technology. This device is suitable for various applications including automated systems, instrumentation, industrial control, power supply, and so forth. The device offers superior performance in terms of stability, noise immunity, and low power consumption.

The device features an onboard programmable frequency range. This range is programmable through the user-defined digital pins. Furthermore, the device provides a wide operating temperature range from -40° to +85°C. Additionally, an onboard voltage controlled oscillator (VCXO) can be configured to provide maximum stability and accuracy in oscillator operation.

The working principle of the SIT9121AI-1D3-33E159.375000T oscillator is based on the crystal oscillator. The circuit usually includes an oscillator, an amplifier, a frequency divider, a frequency multiplier, a temperature-sensitive resistor (thermistor), as well as two voltage controlled capacitors (varicaps).

When the oscillator is powered up, it begins to oscillate. The input of the oscillator is connected to the voltage controlled capacitors (varicaps). The voltage applied to the capacitors influences the pulse width or frequency of the oscillation. The frequency of the oscillation is divided by the divider and then multiplied by the multiplier to obtain the desired output frequency.

The temperature-sensitive resistor (thermistor) in the circuit provides thermal compensation of the voltage across the varicaps. When temperature rises, the resistance of the thermistor changes, which in turn affects the voltage seen by the varicaps, thus compensating for thermal induced frequency changes.

The SIT9121AI-1D3-33E159.375000T is a programmable oscillator that provides flexibility in terms of application requirements. It offers stable and accurate oscillator performance with low power consumption and low noise operation. The device provides numerous advantages over traditional oscillators for a wide range of applications.

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