Logical operator based digital filter
US5796643A · kind A · utility
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4Claims
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Key dates
| Filing date | Jan 2, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jan 2, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0238
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital filter with a reduced filtering time. On/off data provided by eight contacts are read at predetermined time intervals, and the on/off data are stored in 8-bit binary data. (four-to one-cycle-previous data and new data). Logical AND and logical OR between the data are carried out to obtain AND result X and OR result Z, logical operations between the previous result In-1 and AND result X is carried out to obtain a result Y, and logical AND between the result Y and the OR result Z is carried out. A bit "A" whose AND result X is "1" is set again to "1", and a bit B whose OR result Z is "0" is set again to "0".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.