Fig. 1. Human brain processing complex information, the relationship between biological and electrical synapses, and the basic characterization of synaptic transistors.
a Schematic diagram depicting the complex information encompassed by the analog signals. b The human brain processes high-frequency information through sparse representation to obtain filtered low-frequency information. c Low-energy operating modes in the human brain are facilitated by neurons connected through different weighted nodes. d Structure diagram of the synaptic transistor and basic crystal of ZIF-67. e A biological chemical synapse is illustrated schematically, comprising a presynaptic terminal, a receptor, and a postsynaptic terminal. f Various functional areas in the human brain are composed of billions of neural networks. g SEM images of ZIF-67. h XRD patterns of ZIF-67. i Channel current dependence of the gate voltage analyzed at a Vpost of 0.5 V