In this paper, we present an integrated and fire neuron designed in a
22-nm FDSOI technology. In this novel design, we deploy the back-gate
terminal of FDSOI technology for a tunable design. For the first time,
we show analytically and with pre- and post-layout simulations a neuron
with tunable spiking frequency using the back-gate voltage of FDSOI
technology. The neuron circuit is designed in the sub- hreshold region
and dissipates an ultra-low energy per spike of the order of Femto
Joules per spike. With the layout area of only 30 um2, this is the
smallest neuron circuit reported to date.