Power transistor driver stage with optimally reduced turn-off delay
US5469094A · kind A · utility
18Cited by
3References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 31, 1994 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/166
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fast-discharge switch is controlled by a comparator sensing the voltage difference between the output node and the input node of a driving integrator stage that controls the slew-rate of a power switching output transistor. The fast-discharge switch turns off automatically when the output power transistor reaches (in the case of a MOS transistor) or exits (in the case of a bipolar transistor) saturation. The circuit of the invention accelerates the discharge thus reducing the turn-off delay and is insensitive of load conditions and does not affect the performance of the integrating (driver) stage that control the slew-rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.