Digital logarithmic apparatus
US4089060A · kind A · utility
Inventor
Key dates
| Filing date | Oct 15, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Oct 15, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/62
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Digital apparatus for approximating the logarithmic equation of the form: X= W Log.sub.z (Y)+ K where W and K are selected constants, employs basically a three counter, one comparator logarithmic digital calculator assembly. A source provides a selected train of time spaced pulses to a divide by N counter, which drives a first counter. The clock pulses also go to a second counter. The comparator at each clock pulse compares the counts of the first and second counters. If the count of the second counter is greater than that of the first counter, an output pulse is produced, which resets the second counter and including an output circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.