Patent ID: 9550423
Date: 2017-01-24
CPC Classifications: B60L,G01R,G05F,H02H

Claim:
1. An interlock switching circuit for protecting an electrical on-board power supply of an electrically drivable vehicle, comprising: a conductor loop; a first current source; a first current mirror; a second current mirror; a third current mirror; a first switching device; and a second switching device, wherein the first current source is configured to drive a current flowing out of an input of the first current mirror into an input of the second current mirror, wherein the conductor loop is connected between an output of the first current mirror and an output of the second current mirror, wherein the first switching device is configured to optionally switch the first current source (i) between the input of the first current mirror and the input of the second current mirror, or (ii) between the input of the first current mirror and an input of the third current mirror, and wherein the second switching device is configured to optionally connect the output of the first current mirror to the output of the second current mirror or to an output of the third current mirror.