Circuit arrangement for arithmetic combination of an analog signal with a digital value and method and circuit arrangement for determination of an angle
US6041336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/485
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The circuit arrangement for determining an angle (.alpha.) from analog signals (C,S) proportional to the sine and cosine of the angle (.alpha.) to be determined includes PA1 a circuit device for multiplying an analog signal (S) with a digital value (Cs) for obtaining a first product value (S*Cs), the digital value (Cs) being proportional to the cosine of an estimated angle value (.alpha..sub.s) for the angle (.alpha.) to be determined; PA1 a circuit device for multiplying another analog signal (C) with another digital value (Ss) to obtain a second product value (C*Ss), the another digital value (Ss) being proportional to the sine of the estimated angle value (.alpha..sub.s) for the angle (.alpha.) to be determined; PA1 a circuit device for adding the first and second product values (S*Cs; C*Ss) to obtain a sum value (Su); PA1 a circuit device for equalizing proportionality factors of the one and/or the other digital value (Ss; Cs) so that the sum value (Su) formed is proportional to sin (.alpha.-.alpha..sub.s); and PA1 a circuit device for adjusting the sum value (Su) to zero so that the estimated angle value (.alpha..sub.s) corresponds to the angle (.alpha.) to be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.