Patent ID: 9577629
Date: 2017-02-21
CPC Classifications: H03K

Claim:
1. A circuit comprising: at least one transistor, wherein a current that flows from a first connection to a second connection of the transistor can be controlled; at least one first measuring/control circuit for determining the current and causing the at least one transistor to be switched on when the current is below and at most up to a predetermined, non-positive threshold value, and otherwise to be switched off when the current is above the predetermined, non-positive threshold value, wherein the at least one first measuring/control circuit comprises a second measuring/control circuit parallel to the at least one first measuring/control circuit, the second measuring/control circuit comprising a second amplifier to amplify at least a portion of the current input into the at least one first measuring/control circuit, the second amplifier connected to a gate of a shutdown device for switching off the at least one transistor faster than the at least one first measuring/control circuit in case of an emergency if the current is a positive current of an opposite polarity of the non-positive threshold value.