Patent ID: 7626346

Claim:
Circuit for regulating a current applied to an electrical load ( 4 ), comprising a compensation unit ( 3 ) comprising a temperature sensor ( 32 ) and providing an electrical signal at an output ( 302 ), the electrical signal depending on the current applied to the electrical load ( 4 ) and on a temperature measured by the temperature sensor ( 32 ), a reference unit ( 2 ) providing a reference electrical signal, and a control unit ( 1 ) regulating the current applied to the electrical load ( 4 ) depending on a difference between the electrical reference signal and the electrical signal provided at the output ( 302 ) of the compensation unit ( 3 ), characterized in that: the compensation unit ( 3 ) further comprises means for providing an electrical signal depending on the current applied to the electrical load ( 4 ), means for providing a bias signal depending on the temperature measured by the temperature sensor ( 32 ) and for a superposition of the electrical signal depending on the current with the bias signal forming the electrical signal provided at the output ( 302 ) of the compensation unit ( 3 ), and said means for providing the bias signal comprise a first resistor network ( 303 ) connecting a bias voltage source ( 36 ) to the output ( 302 ), the bias voltage source providing a bias voltage, and a second resistor network ( 304 ) connecting the input ( 301 ) to the output ( 302 ); wherein the first resistor network ( 303 ) or the second resistor network ( 304 ) comprises the temperature sensor ( 32 ).