A Circuit Model of Sensory Receptor Function
The main objective of this work is the design of a circuit that can mimic the activity of sensory receptors. Several integrate-and-fire models have been proposed for a generic neuron: Lapicque’s RC circuit, the Hodgkin and Huxley model, and various VLSI circuits. The first two models do not respond appropriately to time-varying stimuli. On the other hand, the problem with many VLSI circuits is that they are usually designed to demonstrate specific neural features, for a single neural pathway.
The firing rate of a periphery sensory neuron can be explained by using a theoretical model based upon information transmission along the nerve fiber . This model accounts for varying neural firing rates, and adaptation/deadaptation effects. By modifying an integrate-and-fire circuit, one can mimic the equivalent behaviour of this theoretical model.