A control circuit to control the operation of a power converter, the control circuit comprising: a common control node (122; 402) electrically coupled to an input of a controller for the power converter; a first sub-control circuit that includes: a first operational amplifier that includes a first input, a second input and an output; a first capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the first input of the first operational amplifier; and a first diode that includes a first terminal and a second terminal, the first terminal coupled to the first operational amplifier output and the second terminal coupled to the common control node; and a second sub-control circuit that includes: a second operational amplifier that includes a first input, a second input and an output; a second capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the second input of the second operational amplifier; and a second diode that includes a first terminal and a second terminal, the first terminal coupled to the second operational amplifier output and the second terminal coupled to the common control node; and characterized in that the input of the first capacitive feedback circuit and the input of the second capacitive feedback circuit are each directly connected to the common control node. a common control node (122; 402) electrically coupled to an input of a controller for the power converter; a first sub-control circuit that includes: a first operational amplifier that includes a first input, a second input and an output; a first capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the first input of the first operational amplifier; and a first diode that includes a first terminal and a second terminal, the first terminal coupled to the first operational amplifier output and the second terminal coupled to the common control node; and a first operational amplifier that includes a first input, a second input and an output; a first capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the first input of the first operational amplifier; and a first diode that includes a first terminal and a second terminal, the first terminal coupled to the first operational amplifier output and the second terminal coupled to the common control node; and a second sub-control circuit that includes: a second operational amplifier that includes a first input, a second input and an output; a second capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the second input of the second operational amplifier; and a second diode that includes a first terminal and a second terminal, the first terminal coupled to the second operational amplifier output and the second terminal coupled to the common control node; and characterized in that the input of the first capacitive feedback circuit and the input of the second capacitive feedback circuit are each directly connected to the common control node. a second operational amplifier that includes a first input, a second input and an output; a second capacitive feedback circuit that includes an input coupled to the common control node and an output coupled to the second input of the second operational amplifier; and a second diode that includes a first terminal and a second terminal, the first terminal coupled to the second operational amplifier output and the second terminal coupled to the common control node; and characterized in that the input of the first capacitive feedback circuit and the input of the second capacitive feedback circuit are each directly connected to the common control node.