A low-pass filter, including: between a first terminal and a second terminal, a series association of a first resistor, of a second resistor, and of a first amplifier; in parallel with the second resistor, a series association of a second amplifier and of a first capacitor; a second capacitor between an input of the first amplifier and a third terminal of application of a reference voltage; and a third capacitor between the second terminal and the third terminal.