Comparator-less pulse-width modulation
US8872594B2 · kind B2 · utility
1Cited by
3References
19Claims
0Family size
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Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulse width modulation device includes a switching transistor for defining modulation phases, a capacitor, and switches arranged to: a) in a first phase, charge the capacitor to a voltage corresponding to the on/off threshold of the switching transistor, and b) in a second phase, connect the capacitor between a terminal for applying a setpoint voltage and the gate of the switching transistor. A constant current source is connected to apply a current in the capacitor tending to bring the gate of the switching transistor toward the on/off threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.