Phase Noise is a frequncy represantation of random fluctuations of the phase of the oscillator output signal.
Phase noise is perhaps the most important parameter in many oscillators.
Ideally, the spectrum of an oscillator is an impulse at a single frequency. However,
in any practical oscillator, the spectrum has power distributed around the desired oscillation
frequency, in addition to power located at harmonic frequencies. This undesirable power distribution around the desired oscillation frequency is known as phase noise.
Phase noise is perhaps the most important parameter in many oscillators.
Ideally, the spectrum of an oscillator is an impulse at a single frequency. However,
in any practical oscillator, the spectrum has power distributed around the desired oscillation
frequency, in addition to power located at harmonic frequencies. This undesirable power distribution around the desired oscillation frequency is known as phase noise.
