Hi,
I am developing a pulse oximeter using AFE4405. 3 LEDs(green, red, IR) are being used for calculating heart rate and SpO2. The problem is that when I use 3 LEDs at the same time using SFH7072, Rf values should be different between two groups(1: Green/Ambient and 2: Red/IR) or each phase needs to have different Rf value. (Previously one RF value was ok for SFH7060 but as for SFH7072, one Rf can't make the 3 values ok.)
In the cases of two Rf modes or 4 Rf modes, how can I subtract ambient value from the values for green, red and ir ? The ambient values should be different per Rf value. Can I just multiply a ratio between the Rf values of the target phase and the Rf values of the ambient phase with the ambient value to get the ambient value of the target phase ?
Thanks,
Konan
