As usual in RC filter designs.
resistors R1-R4 and R5-R8
are given equal values. Unfortunately,
again as usual. This
leads to rather awkward values
of the capacitors. However,
rounding off these values to
the nearest E12 value leads to
rippIes in the transfer characteristic.
The specified component
values give a cut-off frequency
of 1 kHz.
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