~ 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 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

T3   µ	T2  µs	T1  µs	Sig. Figures
ƒ=  Hz	ƒ=  Hz	ƒ=  Hz	Calculated –3dB corner frequency ƒ=1/2πT
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

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

This is my least preferred topology for an RIAA network as the values do fit the standard available so it should suit those who like making odd values from multiple capacitors ~ It does like RIAA-1 allow the outer foils of both capacitors to be at signal ground [albeit the supply] so they can be against a ground plane without affecting the response  ΐ

" The busy world was not for me ~ So I went and found my own "