CHARGE DOMAIN SYNAPSE CELL

A semiconductor charge domain synapse cell has a capacitor coupled between an input line and an intermediate node. A high-to-low voltage transition applied to the input line causes charge transfer from one summing line to the intermediate node through a first device having a programmable threshold. A second device then transfers the charge from the intermediate node to another summing line in response to the next low-to-high transition of the input. The amount of charge transferred is proportional the amplitude of the pulsed input, the programmed voltage threshold, and the capacitance value.