1 Delay-Resistor Implementation of Integrators for Biomimic Artificial Neurons Richard B. Wells Bruce Barnes

2 Background: Design Application: –Pulse-Mode Artificial Neurons and, in particular, –“Biomimic” Artificial Neurons Artificial Neurons Specifically Designed to Mimic the Signal Characteristics of Real Neurons

3 Design Objectives Mimic Asymmetrical Integration Properties of Biological Neurons Low Power Dissipation Small Chip Area This Circuit is Intended to Operate Within a Feedback Loop in a Biomimic Artificial Neuron

4 Hodgkin-Huxley Model The H-H Model Describes the Dynamics of Membrane Potential

5 Linear Prototype Model Low-Gain Non-Inverting Amplifier Open-Loop Gain Approximately 2.8 V/V “Delay Resistors” are P-MOSFETs

6 Linear Model Transfer Function Circuit Has 2 Real Poles, 1 Zero One Pole is a Dominant Pole This Results in Leaky-Integrator Transfer Function

7 The Non-Linear Circuit Circuit w/ Buffered Current Source Input

8 Transfer Characteristic Current In to Voltage Out

9 Integrator Response Fall Time vs. Vbias of Delay Resistors

10 Response to Pulse Input Vbias = 1.77 Volts

11 Thank You. Questions?