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in order to eliminate body effect one way is to connect the substrate to source when the well is for a single device (PMOS with a well in a CMOS for example) , but i read that it increases the source to substrate capacitance to connect them together , i don't really know the reason why would that increase the capacitance Csb ? Thanks

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  • \$\begingroup\$ How can there be a capacitance from substrate to source if they are connected together? \$\endgroup\$ – Elliot Alderson Feb 21 at 2:43
  • \$\begingroup\$ If you mean temporarily connecting them with another switch like a MOSFET, an open MOSFET has its own capacitance that would be added in parallel. \$\endgroup\$ – K H Feb 21 at 8:05
  • \$\begingroup\$ @ElliotAlderson That's what i'm exactly wondering about since yesterday what are the disadvantages of eliminating body effect by connecting source and substrate together , the only one i found is the mentioned capacitance increase but i couldn't find logical reasons \$\endgroup\$ – Ahmed G Diab Feb 21 at 13:22

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