Patent ID: 7466150

Claim:
An apparatus for generating a power signal from a load current flowing through an external apparatus, comprising: a controller with a load current input for the load current, a load current output for the load current, an intermediate signal output for an intermediate signal, and a status signal output for a status signal; an influencer with an intermediate signal input for the intermediate signal and a power signal output for the power signal; and an interrupter with an interruption input for the power signal, an interruption output for the power signal, and a status signal input for the status signal, wherein the controller is formed to generate the status signal and the intermediate signal, depending on the load current; wherein the interrupter is formed to interrupt the power signal if the status signal satisfies a predetermined first condition, and otherwise let the power signal pass; and wherein the influencer is formed to output the intermediate signal as the power signal at the power signal output if the intermediate signal does not satisfy a predetermined second condition, and otherwise generate and output the power signal with a predetermined value, or is formed so as to output the intermediate signal as the power signal at the power signal output if the load current does not satisfy a predetermined second condition, and otherwise generate and output the power signal with the predetermined value.