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Is there leakage current in Analoglib's cap?

yysunj

I wonder whether leakage current occurs in analoglib's cap.

Please tell me about this.

Thank you

yysunj

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  • No. Assuming that you’re just using the default and not a specific model which models it differently, this uses spectre’s capacitor component which is a pure capacitor (it could be nonlinear but there’s no resistive part - see “spectre -h capacitor “.

    That said, if either end of the capacitor has no path to ground, spectre may add a gmin conductance to ground (default value is 1e-12 Siemens) which you might perceive as leakage. This is added as a convergence aid to help converge floating nodes which otherwise would be completely uncontrolled. 

    Andrew

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  • No. Assuming that you’re just using the default and not a specific model which models it differently, this uses spectre’s capacitor component which is a pure capacitor (it could be nonlinear but there’s no resistive part - see “spectre -h capacitor “.

    That said, if either end of the capacitor has no path to ground, spectre may add a gmin conductance to ground (default value is 1e-12 Siemens) which you might perceive as leakage. This is added as a convergence aid to help converge floating nodes which otherwise would be completely uncontrolled. 

    Andrew

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