The present invention provides a circuit including a reference voltage generator and a plurality of receivers, wherein the reference voltage generator is configured to generate a reference voltage, and each of the receivers is configured to receive the reference voltage and a corresponding input signal to generate a corresponding output signal. In addition, for at least a specific receiver of the plurality of receivers, the specific receiver comprises at least one amplifying stage, the amplifying stage comprises a first input terminal configured to receive the corresponding input signal, a second input terminal configured to receive the reference voltage, a first output terminal configured to generate a first signal, and a second output terminal configured to generate a second signal; and the specific receiver further comprises a first feedback circuit coupled between the first output terminal and the second input terminal.