A noise suppressor, comprising: a first differential-mode transmission module including a first pair of terminals, a second pair of terminals, and a third terminal; a second differential-mode transmission module including a first pair of terminals that are respectively and electrically connected to said second terminals of said first differential-mode transmission module, a second pair of terminals, and a third terminal; and a module including a first terminal that is electrically connected to said third terminal of said first differential-mode transmission module, a second terminal that is electrically connected to said third terminal of said second differential-mode transmission module, and a third terminal that is electrically connected to a reference node; said first and second differential-mode transmission modules (2, 3) being configured to receive a differential signal at said first terminals of said first differential-mode transmission module, and to permit the differential signal to be transmitted through said first and second differential-mode transmission modules (2, 3) to be outputted at said second terminals of said second differential-mode transmission module; characterized in that, said module is a common-mode absorption module which is configured to absorb common-mode noise of the differential signal from at least one of said first differential-mode transmission module or said second differential-mode transmission module that are electrically connected to the common-mode absorption module such that the common-mode component of the differential signal goes to the common-mode absorption module 4 and further to the ground and the energy of the common-mode component of the differential signal is consumed by the common-mode absorption module. a first differential-mode transmission module including a first pair of terminals, a second pair of terminals, and a third terminal; a second differential-mode transmission module including a first pair of terminals that are respectively and electrically connected to said second terminals of said first differential-mode transmission module, a second pair of terminals, and a third terminal; and a module including a first terminal that is electrically connected to said third terminal of said first differential-mode transmission module, a second terminal that is electrically connected to said third terminal of said second differential-mode transmission module, and a third terminal that is electrically connected to a reference node; said first and second differential-mode transmission modules (2, 3) being configured to receive a differential signal at said first terminals of said first differential-mode transmission module, and to permit the differential signal to be transmitted through said first and second differential-mode transmission modules (2, 3) to be outputted at said second terminals of said second differential-mode transmission module; characterized in that, said module is a common-mode absorption module which is configured to absorb common-mode noise of the differential signal from at least one of said first differential-mode transmission module or said second differential-mode transmission module that are electrically connected to the common-mode absorption module such that the common-mode component of the differential signal goes to the common-mode absorption module 4 and further to the ground and the energy of the common-mode component of the differential signal is consumed by the common-mode absorption module.