XLL725156.250000X

Oscillators

Oscillators are electrical circuits that generate a periodic signal, and they are often used in fields such as communication, control systems, and radio engineering. XLL725156.250000X oscillator is one kind of oscillators. It is also called low phase noise, high linearity oscillator, which is used in radio communication systems, such as GSM, CDMA, WCDMA, and LTE system.

Applications

XLL725156.250000X oscillator can provide high output performance under extreme temperature conditions, low phase noise in wideband range, and low consumption current. Moreover, it is extremely compact and can be configured to meet various temperature profiles, frequency accuracy, supply voltage, demand and other needs. As its special characteristics and the general requirement for the radio communication, it is mainly used in basic frequency phase detection of radio communication systems, including GSM/TD-SCDMA/CDMA/ WCDMA/LTE and etc.

Working Principle

XLL725156.250000X oscillator adopts low phase noise voltage-controlled crystal oscillator (VXCO) as the basis. It uses the crystal resonator as the frequency-determining element in the oscillator, and add a voltage control element in the crystal oscillator to keep the oscillation frequency of the oscillator stable. The voltage-controlled crystal oscillator is basically composed of an amplifier and a crystal resonator. Its working principle is to generate a sine wave signal of a certain frequency by providing a positive feedback signal. The main feature is that its output frequency can be controlled by the control voltage. When the control voltage is low, the oscillation frequency is low; when the control voltage is high, the oscillation frequency is high. In XLL725156.250000X oscillator, its frequency stability is ensured by the difference between the oscillation frequency and the resonance frequency of the crystal (in military communication, it requires high frequency stability). In addition, its low phase noise and linearity is ensured by the excellent design of controlling parameters and components.