Electronic apparatus for biological research Electronic apparatus for biological research . electronicappara00dona Year: 1958 l^2g''id -1^29^1^ ^l- -^V'2grid QnP'^g * ^V. '99 m /?,© Figure Figure Figure which, if R]^ <^ Rg, reduces to Figure In both cases the coupling is seen to form a high-pass filter of time constant CRy or turn-over frequency co^ = \l(CRg). co^ must therefore be below the lowest frequency the amplifier is required to transmit without significant loss 153

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