Masaki Sano Hiroki Nishikawa Xiangbo Kong Hiroyuki Tomiyama Tongxin Yang Tomoaki Ukezono Toshinori Sato An Accuracy-Controllable Approximate Adder for FPGAs. 60-66 2022 ATAIT https://ceur-ws.org/Vol-3198/paper8.pdf conf/atait/2022 db/conf/atait/atait2022.html#SanoNKTYUS22