Ripple noise often occurs in Phoenix power distribution system. This noise will cause interference to the surrounding high-speed devices, and may cause chip misoperation. If there is not enough stable power supply to support high-speed components, the behavior will be unpredictable.

電源完整性分析主要討論和解決電源供給的穩定性問題。對于理想的電源分配系統傳輸路徑阻抗為零，在電源平面上任何一點的電位都是保持恒定，并等于系統供給電壓而實際的電源分配系統，由于各種噪聲干擾的存在，電源分配系統上的電位會有波動，有時甚至很嚴重影響系統的正常工作。

Power integrity analysis mainly discusses and solves the stability of power supply. For the ideal power distribution system, the transmission path impedance is zero, and the potential at any point on the power plane is constant and equal to the system supply voltage. However, in the actual power distribution system, due to the existence of various noise interference, the potential on the power distribution system will fluctuate, sometimes even seriously affect the normal operation of the system.

菲尼克斯電源不穩定的主要表現形式就是同步開關噪聲，是指高速開關器件狀態切換時產生的瞬態交變電流，在經過回流路徑上存在電感時，形成的交流壓降所以也稱為噪聲。如果電源反彈噪聲的相位與地反彈噪聲相反，會使高電平信號上噪聲波形幅度加倍。

The main manifestation of the instability of Phoenix power supply is synchronous switching noise, which refers to the transient alternating current generated when the high-speed switching devices switch state. When there is inductance in the return path, the AC voltage drop is formed, so it is also called noise. If the phase of the power rebound noise is opposite to that of the ground rebound noise, the amplitude of the noise waveform on the high level signal will be doubled.

電壓調節模塊是供電的源端，轉換電壓到另一個電壓。某元件的使用一個參考電壓和反饋回路來監測負載電壓，從而達到調節輸出電流的作用。

The voltage regulation module is the source end of the power supply, which converts the voltage to another voltage. A reference voltage and feedback circuit are used to monitor the load voltage of a component, so as to regulate the output current.