harry456
Member level 1
I tried to plot the capacitance as calculated with a bsim-model and I know that the spice software calculates the values like Cij = dQi/dVj but I don't know how that works. Esp. because Cdb and Cbd are different.
Could someone explain to me why Cdb and Cbd (resp Csb and Cbs) are different in my case?
![capschem2.png capschem2.png](https://www.edaboard.com/data/attachments/54/54331-7219c81c4db10d840209ad48c2ab821c.jpg)
I guess that around VSource=-600 mV the source-body diode get conductive but why is there a difference between Cbd and Cdb and with of them is the drain-bluk capacitance?
Could someone explain to me why Cdb and Cbd (resp Csb and Cbs) are different in my case?
![capschem2.png capschem2.png](https://www.edaboard.com/data/attachments/54/54331-7219c81c4db10d840209ad48c2ab821c.jpg)
I guess that around VSource=-600 mV the source-body diode get conductive but why is there a difference between Cbd and Cdb and with of them is the drain-bluk capacitance?