Patent ID: 8680701

Claim:
A circuit for regulating a DC voltage applied between a first DC voltage terminal and a second DC voltage terminal, the circuit comprising: a controllable switch system having: a first terminal connectable to the first DC voltage terminal, a second terminal, a first control terminal, and a second control terminal, wherein the controllable switch system is configured to establish an electrical connection between the first terminal and the second terminal, when a first control signal applied to the first control terminal satisfies a first criterion or when a second control signal applied to the second control terminal satisfies a second criterion; a resistor having a first resistor terminal connected to the second terminal and having a second resistor terminal connectable to the second DC voltage terminal; a first control circuit configured to generate the first control signal at a first control output terminal connected to the first control terminal, wherein the first control signal is generated to satisfy the first criterion, if the DC voltage is above a first DC voltage threshold; a second control circuit configured to generate the second control signal at a second control output terminal connected to the second control terminal, wherein the second control signal is generated to satisfy the second criterion, if the DC voltage is above a second DC voltage threshold, wherein the second DC voltage threshold is greater than the first DC voltage threshold.