Math circuit for estimating a transcendental function
US9465580B2 · kind B2 · utility
21Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Sep 3, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/5521
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A math circuit for computing an estimate of a transcendental function is described. A lookup table storage circuit has stored therein several groups of binary values, where each group of values represents a respective coefficient of a first polynomial that estimates the function to a high precision. A computing circuit uses a portion of a binary value, that is also taken from one of the groups of values, to evaluate a second polynomial that estimates the function to a low precision. Other embodiments are also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.