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Simulators >> Circuit Simulators >> Finesim spice simulation results for leakage power
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Message started by Yuyu11131 on Apr 14^th, 2016, 1:17pm

Title: Finesim spice simulation results for leakage power
Post by Yuyu11131 on Apr 14^th, 2016, 1:17pm

Hi all,

I have questions about how to understand the simulation results from Finesim for leakage power.

I ran the leakage power characterization for a cell. The results have the following items:

input_current_InputPinName= current_value from= t_start to= t_end
input_voltage_InputPinName= voltage_value from= t_start to= t_end

supply_current_Vsubstrate= current_value from= t_start to= t_end supply_current_Vdd= current_value from= t_start to= t_end
supply_current_Vgnd= current_value from= t_start to= t_end

supply_voltage_Vsubstrate=voltage_value from= t_start to= t_end
supply_voltage_Vdd=voltage_value from= t_start to= t_end
supply_voltage_Vgnd=voltage_value from= t_start to= t_end

I tried to compare the values from the above to the liberty file and found that
Leakage power of a cell = supply_current_Vsubstrate * supply_voltage_Vsubstrate + supply_current_Vbody * supply_current_Vbody.

The equation gives the impression that the leakage power only relates to the supply pins (Vdd and Vsubtrate).

So my questions are:
1. Do the input current & current flow to ground pin contribute to the leakage current?
2. If yes to 1, how? is there any equation that I can follow?
3. If no to 1, then what are these two currents for?

Thank you very much!!