Imec built a 7bit 150Gsample/s digital to analogue converter using 5nm finfet CMOS. Revealed at the Symposium on VLSI Technology and Circuits in Kyoto, it achieves data rates of up to 300 Gbit/s using PAM-4 modulation, said the Belgian research institute, which is aiming it at data centres. “PAM-4 has emerged as the preferred modulation scheme in data centres, enabling ...