STADIO FINALE DI POTENZA INTEGRATO MONOLITICAMENTE

• Main Author: UEBELE MANFRED
• Format: Patent
• Language: Italian
• Published: 17.06.1994
• Subjects: BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; BLASTING; COMBUSTION ENGINES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; PULSE TECHNIQUE; SEMICONDUCTOR DEVICES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

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.