Digital signal processing system employing logarithms to multiply and divide
US4555768A · kind A · utility
28Cited by
5References
20Claims
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Key dates
| Filing date | Jun 7, 1983 |
| Grant date | Nov 26, 1985 |
| Priority date | — |
| Expiry date | Jun 7, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/0307
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital signal processing system applies numbers to the multiplied or divided to address a memory storing a logarithm table to produce the logarithms of the numbers. These logarithms are added for multiplication or substracted for division to produce the logarithm of the result number which is applied to address a memory storing an antilogarithm table to produce the result number. The base of the logarithms is selected in accordance with the magnitudes of the numbers to be multiplied or divided so as to utilize substantially the entire range of magnitudes of the digital representation of the logarithms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.