Improved structures for neuron MOSFETs, which can execute a weighted summat
ion of multiple input signals, are proposed and tested. Both an additional
polysilicon shield and a substrate biasing show good control of the turning
point of the neuron MOSFET inverters fabricated using a double poly-CMOS t
echnology. The improved accuracy is demonstrated by fabricating A/D convert
er circuits utilising the neuron MOSFETs.