Method for generating quadratic curve signal
US4789954A · kind A · utility
5Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | May 13, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Assuming that a given equation representing a quadratic curve is: EQU F(x, y)=ax.sup.2 +bxy+cy.sup.2 +dx+ey+f=0, the method for generating quadratic curve signals repeatedly selects a point close to F (x, y)=0 in only one of either the region of F (x,y).gtoreq.0 or the region of F (x,y)<0. This method allows to generate quadratic curve signals by using only a few parameters and without using complicated calculations. A hardware implementation is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.