I was looking for clarification as to whether the neurons are implemented as analog circuits as well, especially with the reference to Dr. Carver Mead in the be

I was looking for clarification as to whether the neurons are implemented as analog circuits as well, especially with the reference to Dr. Carver Mead in the beginning of the article, who has a long history of working on analog neuron circuits, but I did not see any explicit references to whether the neurons were digital or analog.