Simulation Experiments for Neural Pulses - Brain Theory from a Circuits and Systems Perspective - page 187

Fig. A.6 A control voltage v 2 to stop sodium current

Fig. A.7 Hysteresis generating amplifier to provide control voltage v 2

Fig. A.8 Sodium current stop switch

Potassium Current Potassium current is modeled as beginning at the trigger thresh-
old of about 55 mV and stopping at 90 mV. Control voltage v 3 may be generated

with a hysteresis loop as in Fig. A.9 .
The circuit for this is shown in Fig. A.10 . Note that the reference voltage is

70 mV and the feedback resistor R f ¼ 300 G.