Differential amplifier arrangement and converter arrangement

A differential amplifier arrangement comprising:

• a first input configured to receive a first input signal,
• a second input configured to receive a second input signal,
• a first output configured to provide a first output signal,
• a second output configured to provide a second output signal,
• a common mode loop configured to regulate a common mode output of the differential amplifier arrangement depending on a difference between a common mode reference signal and an average of the first and the second output signal, and
• a differential mode loop configured to regulate a differential mode output of the differential amplifier arrangement depending on a difference between a difference between the first and the second input signal and a difference between the first and the second output signal,
• wherein the difference between the first and the second output signal is substantially constant,
• wherein the common mode loop is further configured to implement at least one low frequency pole by means of which the common mode loop is slowed down,
• wherein the differential amplifier arrangement comprises at least a first and a second amplifying stage,
• wherein the first amplifying stage comprises a first differential amplifier having a first pair of differential input terminals, a first pair of differential output terminals and a control terminal, the first pair of differential input terminals being connected to the first and the second input,
• wherein the second amplifying stage comprises a second differential amplifier having a second pair of differential input terminals and a second pair of differential output terminals, the second pair of differential input terminals being connected to the first pair of differential output terminals of the first differential amplifier, the second pair of differential output terminals being connected to the first and the second output;
• wherein the differential mode loop comprises at least the first and the second amplifying stage, a first and a second transimpedance element,
• wherein the first transimpedance element is connected in a feedback loop between a first terminal of the second pair of differential input terminals and a first terminal of the second pair of differential output terminals of the second differential amplifier thereby forming a first branch of the differential mode loop,
• wherein the second transimpedance element is connected in an additional feedback loop between a second terminal of the second pair of differential input terminals and a second terminal of the second pair of differential output terminals of the second differential amplifier, thereby forming a second branch of the differential mode loop;
• wherein each of the first and the second transimpedance elements comprises a first and a second resistor and a first and a second capacitor, and
• wherein the first resistor and the first capacitor are connected in parallel forming a parallel connection, the second resistor is connected in series to the parallel connection, thereby forming a serial connection, and the second capacitor is connected in parallel to the serial connection.