Monolithically integrated power output stage
US5539301A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Jun 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A monolithically integrated power output stage detects the load current through an output-stage transistor. Switch logic coupled to an output transistor is for switching the output transistor when a predetermined load-current threshold is reached. In this connection, the output transistor is integrated in a separate insulated .pi.-well which contains, in addition, a diode which couples the .pi.-region of the .pi.-well to a ground terminal. This limits the maximum potential to a forward voltage of more than 0 volts and thereby prevents malfunction in normal operation since it leads shift currents in low-resistance to ground by capacitive coupling upon an increase in the voltage of the collector of the output-stage transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.