Resonant Trans Impedance Amplifier transfer function pole map in Bi-Symmetric Log Transformation for a tri-parametric lock-in amplifier used to in-vivo detect Chlorophyll-A in seawater. Colors map the Log distance of the natural frequency associated to 1e6 solutions from 1 kHz (blue). Carlo Guarnieri Calò Carducci Polytechnic of Bari 2015