Patent · US Expired

Short-circuit-resistant trigger circuit layout for an electrical consumer

US4451778A · kind A · utility

6Cited by

4References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Werner Fischer · Heimsheim, DE
Johannes Locher · Stuttgart, DE

Key dates

Filing date	May 24, 1982
Grant date	May 29, 1984
Priority date	—
Expiry date	May 24, 2002

Classification

Technology area (CPC H)Electricity
CPC primaryH02H11/005
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.