Biases:
Ek = 0.85 V
Ena = 1.0 V
Vref = 0.815 V

NA Gating:
Fibias = 100 nA
NAibias = 1 uA
NA p/nbias = 10 uA
Cin = 7
Cfb = 1

K Gating:
Kibias = 20 nA
Kpbias = 50 nA
Knbias = 10 uA

Input:
  1 nA < Iin < 10 nA