phase margin

Gain and Phase Margin Tunning for PID Controllers

基于幅值裕度和相位裕度的自整定PID控制器

Through traverse all values of proportional gain, three-dimensional PID control parameters stability regions under the section of gain and phase margin can be determined.

通过遍历比例增益稳定范围内所有的值，从而给出一种确定幅值相角裕度约束下时滞系统PID参数三维稳定域的算法。

DC gain is 80 dB, unity gain bandwidth is 100 KHz, and the phase margin is 90 °. Floating gate current source is introduced to make the circuit more compact. The area of this design is less than 600 100 square microns.

直流增益大于80dB，单位增益带宽积为100K，相位裕度为90°。浮栅电流源的引入使得本文设计的电路结构更紧凑，面积小于600100平方微米。

Simulation results demonstrate that, under SSS, TTT and FFF conditions, the variation of the unity-gain bandwidth of the PLL is only 12% and the variation of phase margin is only 0.1 degree.

仿真结果显示，在SSS、TTT和FFF三种条件下，环路带宽变化仅为12%，相位裕量只变化0.1°。