Title:
DEVICE FOR PROTECTING SHORTCIRCUIT OF ELECTRIC LOAD
Document Type and Number:
Japanese Patent JPS5814623
Kind Code:
A
Abstract:
A short-circuit-resistant trigger circuit layout is proposed for an electrical consumer for motor vehicles. The trigger circuit layout is located in series with a switching transistor, which is preceded in turn by an operational amplifier whose negative input is coupled with the junction point of two resistors parallel to the transistor and whose positive input receives both an average constant potential and a dynamic switching signal. In case of error, that is, in case of a short-circuit consumer, the transistor, which has initially been switched on, switches back into its blocked state after a predetermined time constant has elapsed. The short-circuit current flowing during this open phase can be limited by means of a resistor in series with the transistor.
Inventors:
BUERUNAA FUISHIERU
YOHANESU ROTSUHIERU
YOHANESU ROTSUHIERU
Application Number:
JP11416082A
Publication Date:
January 27, 1983
Filing Date:
July 02, 1982
Export Citation:
Assignee:
BOSCH GMBH ROBERT
International Classes:
H02H7/20; H02H11/00; H03K17/08; H03K17/082; (IPC1-7): H02H7/20; H03K17/08
Attorney, Agent or Firm:
Kato Taku