Arc-tangent circuit for continuous linear output
US6138131A · kind A · utility
0Cited by
5References
11Claims
0Family size
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Key dates
| Filing date | Nov 27, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Nov 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device suitable for determining arc-tangent of an angle .theta. is provided. Circuitry generates a first square wave at a frequency .omega.t and a second square wave at the frequency .omega.t but shifted by a phase difference equal to the angle .theta.. A pulse width modulation signal generator processes the first and second square waves to generate a pulse width modulation signal having a frequency of .omega.t and having a pulse width that is a function of the phase difference .theta.. The pulse width modulation signal is converted to a DC voltage that is a linear representation of the phase difference .theta..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.