Jan 22, 2018 #1 C cmos_ajay Full Member level 2 Joined Jan 30, 2007 Messages 126 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 2,247 Attached is a curve of NMOS gate capacitance vs applied gate voltage. Can someone show a test circuit diagram to obtain this curve using any SPICE simulator ? Attachments MOSCAP.png 22.3 KB · Views: 120
Attached is a curve of NMOS gate capacitance vs applied gate voltage. Can someone show a test circuit diagram to obtain this curve using any SPICE simulator ?
Jan 22, 2018 #2 erikl Super Moderator Staff member Joined Sep 9, 2008 Messages 8,108 Helped 2,695 Reputation 5,370 Reaction score 2,305 Trophy points 1,393 Location Germany Activity points 44,123 See here: Use a swept DC source between GND and gate: Similar for NMOS Last edited: Jan 22, 2018
Jan 22, 2018 #3 D dick_freebird Advanced Member level 7 Joined Mar 4, 2008 Messages 8,964 Helped 2,333 Reputation 4,683 Reaction score 2,515 Trophy points 1,393 Location USA Activity points 71,433 I would use a transient ramp, not sure a DC analysis (static or swept) will give you the capacitances' effects. Keep gate current and take I, dV/dt in Calculator, plot I/(dV/dt) against V on the X-axis (change axis properties in the viewer).
I would use a transient ramp, not sure a DC analysis (static or swept) will give you the capacitances' effects. Keep gate current and take I, dV/dt in Calculator, plot I/(dV/dt) against V on the X-axis (change axis properties in the viewer).