Switching system developed as module having at least one semicon

Details Switching system developed as module having at least one semicon Switching system developed as module having at least one semicon

1991-09-27

1993-11-16

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307125, 307139, B60L 100

Patent

active

052626768

ABSTRACT:
A switching system includes a module having at least one semiconductor switch for switching current to a load, in particular, a setting member in an automotive control or automatic control device. A short-circuit current monitoring circuit and an idle current monitoring circuit are provided for each semiconductor switch. Each switch may constructed as a multiple-emitter transistor with separate emitter terminals being connected to the respective monitoring circuits whereby load current in the multiple-emitter transistor can be monitored. The short-circuit monitoring circuit outputs a signal indicating excessively large load current in the transistor. The idle monitoring circuit outputs a signal indicating excessively small load current in the transistor.

REFERENCES:
patent: 4114047 (1978-09-01), Melocik
patent: 4349077 (1982-09-01), Sekiguchi et al.
patent: 4809121 (1989-02-01), Nehls

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