Motor stepper driver having a sine digital-to-analog converter
US10931216B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Jan 21, 2020 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jan 21, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepper driver for a motor includes an H-bridge, a sense transistor coupled to the H-bridge, a voltage-to-current (Vtol) converter, and a sine digital-to-analog converter (DAC). The Vtol converter has a Vtol converter input and a Vtol converter output. The Vtol converter output is coupled to the sense transistor. The sine DAC has a sine DAC digital input, a reference input, and a sine DAC output. The sine DAC output is coupled to the Vtol converter input. The sine DAC includes an R-2R network, an offset control circuit coupled to the R-2R network, and a gain control circuit also coupled to the R-2R network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.