Hierarchy in circuit design is often necessary to manage complex layouts that reuse common components such as basic logic gates. We start with logic gates, then we build half adders from them, then a ...

We report carry and sum circuits for a 2-bit adder. The 2-bit adders are designed to be part of a pipelined 2N-bit adder-accumulator. The ICs clock at a maximum of 19 GHz and were fabricated in InAlAs ...

The full-adder circuit diagram shown in the previous page uses two XOR gates, two AND gates, and one OR gate. The circuit can be built with one 7408 AND chip, one 7432 OR chip, and one 7486 XOR chip.