the disclosure relates to a method for detecting a current comprising : generating a bias current , transmitting the bias current to a feedback stage and a measurement stage connected to the measurement node receiving a current to be measured , slaving a voltage to the measurement node at a constant value by the measurement and feedback stages , transmitting to an output stage , a current circulating in the measurement stage , which depends on the bias current and the current to be measured , and converting a current circulating in the output stage into a voltage .