A Mathematical Neuron Model which has a Staircaselike Response Characteristic
In 1961, Harmon proposed an electronic circuit as a neuron model and carried out a series of experimental investigations of its properties . The neuron model is shown in Fig. 1, where two transistors, T1 and T2, together form a monostable circuit whose function is to produce a single pulse if the threshold is exceeded, and T3 and T4 form an amplifier and low impedance output source. The function of T5 is to invert an otherwise excitatory input, and the inverted input is summed with the excitatory input to produce inhibition. The refractory function is obtained from the time constant associated with T1 and T2, whose pulse emitting activity may be inhibited by a graded change in their virtual threshold.
KeywordsNeuron Model Periodic Sequence Tunnel Diode Drive Unit Synaptic Conductance
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