. Electronic apparatus for biological research . Vc grid n->-A)Cga Figure Rl r, fl^/-'''*^- ââ1^2 9'"'^ ^2 -L Cs*Cg^*(uA)C, â go ir^ Figure HT+ HT* ^ n^C, <R S^2 HT- Figure Thevenin's theorem to the part to the left, we get Figure Clearly sinceâ as we have seenâR^ and R^, have to be made much larger than Rj^ the source resistance is higher than in the other systems and the upper cut-off frequency will be correspondingly low. The solution is to connect a compensating capacitance Cq across R^ as in Figure Lumping V^ input capacitances together as Cm, the equ

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. Electronic apparatus for biological research . Vc grid n->-A)Cga Figure Rl r, fl^/-'''*^- ââ1^2 9'"'^ ^2 -L Cs*Cg^*(uA)C, â go ir^ Figure HT+ HT* ^ n^C, <R S^2 HT- Figure Thevenin's theorem to the part to the left, we get Figure Clearly sinceâ as we have seenâR^ and R^, have to be made much larger than Rj^ the source resistance is higher than in the other systems and the upper cut-off frequency will be correspondingly low. The solution is to connect a compensating capacitance Cq across R^ as in Figure Lumping V^ input capacitances together as Cm, the equivalent 156

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