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~ RIAA – 4 Configuration Calculator ~


Calculates the component values to make a passive 'all in one' or 'lumped' RIAA replay equalisation [EQ] network of my type RIAA–4 as shown in this pdf and the schematic below ~ This 2 terminal topology can be used for record or replay EQ developing a voltage across it or current through it depending how it is driven and terminated but it cannot be 'opened' into a 4 terminal network for passive EQ ~ See here for other networks

T3  µs T2  µs T1  µs Pre-populated for RIAA but Value can be changed
ƒ=  Hz ƒ=  Hz ƒ=  Hz Calculated –3dB corner frequency ƒ=1/2πTn

The table below has one component Value in each row that can be changed to accurately calculate the other 3

R7  kΩ R8  kΩ C7  nF C8  nF
R7  kΩ R8  kΩ C7  nF C8  nF
R7  kΩ R8  kΩ C7  nF C8  nF
R7  kΩ R8  kΩ C7  nF C8  nF

Nota Bene I refer to these 2 terminal networks as current driven because they can be used as the output load of a Transconductance amplifier which could be the collector of a transistor with un-bypassed emitter resistor or the anode circuit of Cascode or Pentode where the current develops the RIAA equalised output voltage across the network As shown here ΐ

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