. Electronic apparatus for biological research . Figure where R' = Rj^R/iR^^ -f R). Thus, the effect on the transmission character- istic of the connection of the load is to move the curve bodily to the right, to a new turn-over frequency, higher than the old one by the factor R + Rl Rl Loaded R-C low-pass filter If a load be connected to a simple low-pass filter {Figure ), applying R AAW- c 1 \ _L__r Figure Thevenin's theorem at the capacitance terminals, the open-circuit is Kini?i/(i? + Rj), the resistance looking in at the capacitance terminals is RRJ{R + Rj)

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