Analog neuromorphic circuit for spontaneous Ca oscillations.

This study proposes an innovative analog neuromorphic circuit design to mimic spontaneous Ca oscillations observed in astrocytes. Unlike traditional models, this approach does not rely on synaptic stimulation, suggesting that astrocytes may play a key role in generating neuronal activity. The circuit is built using transistor differential pairs to approximate the nonlinear sigmoidal biological functions, and its performance is validated through simulation and compared against mathematical models using phase diagram analysis.