Abstract: A GaAs depletion-mode MESFET integrated circuit which is implemented with buffered FET logic and contains 155 gates is described. The chip is composed of a 4-bit adder, a 4-bit register, and ...

This project implements a 4-bit Parallel Adder/Subtractor in Verilog using a Ripple Carry Adder (RCA) and logic gates like XOR, AND, and NOT. The design can perform both addition and subtraction based ...

FOUR_BIT_PARALLEL_ADDER F1(a[0],b[0],cin,s[0],cout[0]); FOUR_BIT_PARALLEL_ADDER F2(a[1],b[1],cout[0],s[1],cout[1]); FOUR_BIT_PARALLEL_ADDER F3(a[2],b[2],cout[1],s[2 ...