Reservoir Computing Utilizing a Complementary Combination of n- and p-Channel FeFETs
Rikuo Suzuki, Kasidit Toprasertpong, Ryosho Nakane, Eishin Nako, Mitsuru Takenaka, Shinichi Takagi · IEEE Electron Device Letters · 2024
We investigate the potential of physical reservoir computing utilizing a combination ofn-channel FeFETs (n-FeFETs) andp-channel FeFETs (p-FeFETs). We first confirm that the reservoir computing performance of a singlep-FeFET is similar to that of a singlen-FeFET despite the smaller memory window. We demonstrate that combining both the reservoir states ofn- andp-FeFETs enhances the performance of reservoir computing owing to the complementary behaviors of the two FeFETs: thep-FeFET is turned ON when then-FeFET is turned OFF and vice versa, providing large current output for any gate voltage input. These complementary characteristics provide the reservoir states that exhibit clear nonlinear transformation of any given input. It is also found that additionally combining with techniques using inverted digital inputs can further enhance the performance.