Monolithically integrated power output stage

Details Monolithically integrated power output stage Monolithically integrated power output stage

1994-06-16

1996-07-23

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

437 51, G05F 140, H01L 2170

Patent

active

055393012

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.

REFERENCES:
patent: 3665330 (1972-05-01), Tharmaratnam
patent: 4905067 (1990-02-01), Morelli et al.
patent: 5157573 (1992-10-01), Lee et al.
patent: 5276405 (1994-01-01), Mazzucco et al.
patent: 5286992 (1994-02-01), Ahrens et al.
patent: 5348907 (1994-09-01), Migita

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