Position measuring apparatus with a subdivision circuit for subdividing sinusoidal scanning signals
US5066953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1989 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Nov 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/303
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a position measuring apparatus there is provided a subdivision circuit for the subdividing of sinusoidal scanning signals. The subdivision circuit includes rectifier circuits in which the scanning signals are reformed in such a way that over a total signal period one rectified signal always has a greater signal value than the other rectified signal. The rectified signal with the greater signal value lies on one reference input and the other rectified signal lies on the other reference input of an analog-to-digital converter. The analog-to-digital converter forms from these rectified signals a binary word which is fed to a correction arrangement. Together with code signals which define four equal sections of a single period, the correction arrangement generates a data word which represents intermediate values of a signal period of the scanning signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.