Monolithic Logic Units based on DCFL Structure on p-GaN platform for GaN ICs

GaN-based digital integrated circuits (ICs) are constructed on the commercially available GaN-on-Si p-GaN platform. The functions of inverter, NAND, AND, NOR, and OR logic circuits are successfully realized based on direct-coupled field-effect transistor logic (DCFL) structure. Under a drive voltage of 5V and a load ratio of 20, the low output (VOL) can reach as low as 0.1V. Additionally, a functional-oriented driver is constructed. All the transient tests at frequencies up to 100 kHz exhibit excellent performance characteristics.