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Oscillators

Today, oscillators are widely used in many electronic systems ranging from computers, communications, radar, timing and navigation systems, to signal processing and imaging systems. XLP536156.250000I oscillator is one of them. It is a fixed frequency extremely low power (XLP) oscillator, which provides low phase noise and Fout stability. This article will discuss the application field and working principle of XLP536156.250000I oscillator.

Application Field

XLP536156.250000I oscillator is a high performance oscillator with input supply voltage from 1.2~1.5V and reduced current consumption up to 6mA. This low power oscillator is used in today’s microcontrollers with consumer electronics such as personal computers, cameras, portable PCs and many more portable bank devices. It is typically used for clock oscillators providing a high precision square wave signal for system clock, audio, D-A converter (DAC) and logic interfaces.

The low phase noise performance of this oscillator allows it to be used in precision systems such as WiFi, GPS, 3G and RJ45 telephony and communication systems. Additionally, its reduced current consumption makes it ideal for applications in portable consumer electronics such as mobile phones and PDAs. This oscillator is also used in AC, micro-controller based digital amplifiers/receivers, 3D audio systems, active speakers, home theatre and automotive healthcare systems.

Working Principle

XLP536156.250000I oscillator is a fixed frequency oscillator that produces a square wave signal with a frequency of 536.25MHz. The oscillator consists of an active amplifier (Driver IC), a feedback network containing two quartz crystals, a semiconductor resistors, capacitor, and a ground plane. The active amplifier provides the necessary power to the oscillator circuit. The feedback network supplies the imbalance needed for the oscillator to operate.

The quartz crystal acts as a frequency-dependent impedance which is connected in series with the driver IC. The quartz crystal provides the frequency stability needed for the oscillator to achieve its desired frequency accuracy. The semiconductor resistor and capacitor provide the appropriate resistive and capacitive elements to balance the network and ensure stability. The ground plane acts as a return path for current, providing the necessary common current reference.

Once the oscillator is powered up, the active amplifier drives the quartz crystal to oscillate at 536.25 MHz. As the frequency of oscillation increases, the quartz crystal’s frequency-dependent impedance varies, creating a negative resistance which causes the oscillator to stabilize. The tuned feedback network ensures that the amplifier receives the exact amount of reactance needed to sustain the desired frequency.

The frequency stability and output levels of the oscillator are further improved by the use of feedback technology. The feedback technology works by comparing the actual output frequency of the oscillator with a reference frequency and adjusting the feedback network accordingly. This ensures that the output frequency is within the accuracy specified. As a result, XLP536156.250000I oscillator provides an extremely low power clock signal with a very small phase noise and high levels of frequency accuracy.

Conclusion

In conclusion, the XLP536156.250000I oscillator is a low power low phase noise oscillator which offers high performance and precision for today’s microcontrollers and consumer electronics. The oscillator is capable of generating a square wave with a frequency of 536.25MHz, stability and accuracy to ensure reliable operation in demanding applications. The key components of the oscillator are the active ampli- fier, the feedback network, the quartz crystal, the resistor and capacitor, and the ground plane. Feedback technology further ensures the frequency stability and accuracy of the oscillator.

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