Up/down counter for counting binary data stored in flip flops
US5146479A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/5055
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An updown counter up-counts binary data stored in respective flip-flops in an up-count mode, and down-counts the binary data stored in the respective flip-flops in a down-count mode. When a command for an up-count mode is applied by an up/down control signal, the binary data stored in the respective flip-flops is converted into a complement on two after converting it into a complement on one. When a command for a down-count mode is applied by an up/down control signal, the binary data stored in the respective flip-flops is converted into a complement on one after converting it into a complement on two. The converted data is used to rewrite the data stored in the respective flip-flops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.