Mar 18, 2010 #1 D dtzounakos Member level 3 Joined Mar 16, 2007 Messages 56 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,662 From analog books and papers I have read that the total output capacitance of this circuit is Ctotal = CL+CDB_T9+CGD_T9+CDB_T8+CGD_T8 My question is: Searching "Results Broswers" there are two capacitance CGD and CDG.Obvioussly these capacitance are mutual and different each other Which capacitance (CGD or CDG????) should i use in the above equation in order to obtain the correct total output capacitance?Below i upload the relevant circuit (Opamp)
From analog books and papers I have read that the total output capacitance of this circuit is Ctotal = CL+CDB_T9+CGD_T9+CDB_T8+CGD_T8 My question is: Searching "Results Broswers" there are two capacitance CGD and CDG.Obvioussly these capacitance are mutual and different each other Which capacitance (CGD or CDG????) should i use in the above equation in order to obtain the correct total output capacitance?Below i upload the relevant circuit (Opamp)
Mar 19, 2010 #2 L leozuo Newbie level 6 Joined Mar 13, 2010 Messages 13 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Location USA Activity points 1,334 use Cdg,that means gate voltage changes with drain voltage.
Mar 20, 2010 #3 D dtzounakos Member level 3 Joined Mar 16, 2007 Messages 56 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,662 It seems reasonably to use Cdg parameter. But take a look at this paper......