Feedback circuit with adjustable loop gain for a boost converter

A boost converter circuit comprising:

• a feedback circuit for a boost converter circuit, wherein the feedback circuit comprises:
• a measurement resistance configured to receive a current;
• a feedback resistance;
• a gain circuit comprising a gain output and configured to receive a sensed voltage associated to the measurement resistance, and to provide, at the gain output, a gain signal generated based on the sensed voltage;
• and
• a comparison circuit comprising a comparison output, and configured to generate a comparison signal, at the comparison output, wherein the comparison signal is generated based on the gain signal, a voltage drop across the feedback resistance and a reference signal;
• an inductor;
• an input terminal configured to receive an input voltage;
• an output terminal configured to provide an output voltage;
• a control circuit configured to switch the circuit to perform cycles wherein each cycle comprises an energy discharging state in which the inductor provides energy to the output terminal and an energy charging state in which the inductor stores energy provided by the input voltage;
• wherein the control circuit is configured to switch the boost converter circuit based on the comparison signal.

A method of operating a feedback circuit for a boost converter circuit, the method comprising the steps of receiving, at a measurement resistance, a current;

• receiving, at a gain circuit, a sensed voltage associated to the measurement resistance;
• providing, at a gain output of the gain circuit, a gain signal generated based on the sensed voltage;
• and
• generating, at a comparison output of a comparison circuit, a comparison signal, wherein the comparison signal is generated based on the gain signal, a voltage drop across the feedback resistance and a reference signal.