Electronic apparatus for biological research Electronic apparatus for biological research . electronicappara00dona Year: 1958 iVn SVf Rk Figure -18 volts Figure itself more bias and the current falls. To increase R^ but preserve the status quo in other respects we need a new circuit; we return the bottom of Rj^ to a fixed negative potential (Figure ). Suppose we make R^ 10,000 O. * Assuming we take the output to be dVR^^ + SVr^. Usually only dVR^ is used, so the gain is effectively lessened by the factor RlK^l + Rr)- 167

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