A hearing aid comprising; - a plurality of electrode units (E1, E2, E3), where each of the plurality of electrode units (E1, E2, E3) includes an electrode configured to provide an electrical stimulation to a user of the hearing aid and/or to measure a bio response signal of the user; - a plurality of electrode channel circuits, where each of the plurality of electrode channel circuits includes: ∘ an operational amplifier comprising a first input terminal configured to receive the bio response signal and provide an amplified bio response signal, and the operational amplifier includes a first load input; ∘ a first DC offset unit configured to reduce the impact of DC offset in the electrode channel circuit of the plurality of electrode channel circuits by receiving a part of the amplified bio response signal and converting it to a feedback current signal which is transmitted to the first load input for providing balanced drain currents in the operational amplifier, wherein the hearing aid comprises an analog-to-digital converter which is configured such that the amplified electrical response signal is converted to a digital electrical signal via the analog-to-digital converter, characterized in that the first DC offset unit includes: • a controller configured to provide a control signal based on the digital-electrical signal, • an offset storage capacitor connected to the first input terminal of the operational amplifier or the first load input, • a pulse current source configured to increase or decrease in discrete steps a voltage level of the offset storage capacitor based on the control signal, and wherein the offset storage capacitor is configured to maintain the voltage level at a level proportional to a DC offset voltage at the first input terminal or at the first load input for providing the balanced drain currents of the operational amplifier. - a plurality of electrode units (E1, E2, E3), where each of the plurality of electrode units (E1, E2, E3) includes an electrode configured to provide an electrical stimulation to a user of the hearing aid and/or to measure a bio response signal of the user; - a plurality of electrode channel circuits, where each of the plurality of electrode channel circuits includes: ∘ an operational amplifier comprising a first input terminal configured to receive the bio response signal and provide an amplified bio response signal, and the operational amplifier includes a first load input; ∘ a first DC offset unit configured to reduce the impact of DC offset in the electrode channel circuit of the plurality of electrode channel circuits by receiving a part of the amplified bio response signal and converting it to a feedback current signal which is transmitted to the first load input for providing balanced drain currents in the operational amplifier, ∘ an operational amplifier comprising a first input terminal configured to receive the bio response signal and provide an amplified bio response signal, and the operational amplifier includes a first load input; ∘ a first DC offset unit configured to reduce the impact of DC offset in the electrode channel circuit of the plurality of electrode channel circuits by receiving a part of the amplified bio response signal and converting it to a feedback current signal which is transmitted to the first load input for providing balanced drain currents in the operational amplifier, wherein the hearing aid comprises an analog-to-digital converter which is configured such that the amplified electrical response signal is converted to a digital electrical signal via the analog-to-digital converter, characterized in that the first DC offset unit includes: • a controller configured to provide a control signal based on the digital-electrical signal, • an offset storage capacitor connected to the first input terminal of the operational amplifier or the first load input, • a pulse current source configured to increase or decrease in discrete steps a voltage level of the offset storage capacitor based on the control signal, and • a controller configured to provide a control signal based on the digital-electrical signal, • an offset storage capacitor connected to the first input terminal of the operational amplifier or the first load input, • a pulse current source configured to increase or decrease in discrete steps a voltage level of the offset storage capacitor based on the control signal, and wherein the offset storage capacitor is configured to maintain the voltage level at a level proportional to a DC offset voltage at the first input terminal or at the first load input for providing the balanced drain currents of the operational amplifier.