File:Full Adder using reversible Fredkin gates.svg
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Summary
| Description |
English: Three-bit full adder (add with carry) using five Fredkin gates. The "g" garbage output bit is (p NOR q) if r=0, and (p NAND q) if r=1.
Inputs on the left, including two constants, go through three gates to quickly determine the parity. The 0 and 1 bits swap places for each input bit that is set, resulting in parity bit on the 4th row and inverse of parity on 5th row. Then the carry row and the inverse parity row swap if the parity bit is set and swap again if one of the p or q input bits are set (it doesn't matter which is used) and the resulting carry output appears on the 3rd row. The p and q inputs are only used as gate controls, so they appear unchanged in the output. |
| Date | |
| Source | Own work |
| Author | Bret Mulvey |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:23, 20 November 2023 | | 400 × 206 (7 KB) | Glrx | make relative font-sizes absolute. Also add serif fallback font // Editing SVG source code using c:User:Rillke/SVGedit.js |
| 07:34, 20 November 2023 |  | 400 × 206 (7 KB) | Mikhail Ryazanov | try quoted values in CSS to avoid bug | |
| 22:34, 19 November 2023 |  | 400 × 206 (7 KB) | Mikhail Ryazanov | render bug? | |
| 22:30, 19 November 2023 |  | 400 × 206 (7 KB) | Mikhail Ryazanov | rm. wrong italics | |
| 22:36, 15 December 2016 |  | 400 × 206 (7 KB) | Bretmulvey | User created page with UploadWizard |
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