LC-VCO pnoise仿真后的noise summary如何读？谢谢！

LC-VCO pnoise仿真后的noise summary如下所示：
其中，M0 M2是PMOS电流镜，M4 M1是负阻管
我不清楚Device这一列中的M4.m0、M1.rb指的都是什么？谢谢指点！
Device              Param            Noise Contribution    % Of Total
/M0                 id               4.95531e-14           24.66    
M4.m0               id               2.50109e-14           12.45    
M1.m0               id               2.48462e-14           12.37    
/M2                 id               2.35117e-14           11.70    
M1.m0               fn               1.27088e-14           6.33      
L0.r1               rn               1.1267e-14            5.61      
M4.m0               fn               1.111e-14             5.53      
L0.r2               rn               1.10546e-14           5.50      
M1.rb               rn               3.22953e-15           1.61      
M4.rb               rn               3.21047e-15           1.60      
L0.rsub2            rn               2.53514e-15           1.26      
L0.rsub1            rn               2.45516e-15           1.22      
M4.rg               rn               1.5454e-15            0.77      
M1.rg               rn               1.54303e-15           0.77      
R1_1__dmy0.Rpure    thermal_noise    8.84408e-16           0.44      
R1_2__dmy0.Rpure    thermal_noise    8.84408e-16           0.44      
R2_1__dmy0.Rpure    thermal_noise    8.73101e-16           0.43      
R2_2__dmy0.Rpure    thermal_noise    8.73101e-16           0.43      
R0_1__dmy0.Rpure    thermal_noise    8.23096e-16           0.41      
R0_2__dmy0.Rpure    thermal_noise    8.23096e-16           0.41      
Spot Noise Summary (in V^2/Hz) at 3M Hz Sorted By Noise Contributors
Total Summarized Noise = 2.00922e-13
No input referred noise available
The above noise summary info is for pnoise data with  Vtune = 0.8