Signal detection apparatus and re-driver

A signal detection apparatus, comprising:

• an amplification unit, wherein a first end of the amplification unit is used for inputting a first differential signal pair, a second end of the amplification unit is used for inputting a reference signal pair, the amplification unit comprises a first amplification component and a second amplification component, the first amplification component is configured to amplify the first differential signal pair to obtain a first differential amplified signal pair, the second amplification component is configured to amplify the reference signal pair to obtain a reference amplified signal pair, a third end of the amplification unit is used for outputting the first differential amplified signal pair and the reference amplified signal pair, the first differential amplified signal pair comprises a first target signal and a second target signal, the reference amplified signal pair comprises a first target reference signal and a second target reference signal, and the first amplification component and the second amplification component are the same;
• and
• a comparison unit, electrically connected with the third end of the amplification unit, and configured to compare the first target signal and a reference threshold and compare the second target signal and the reference threshold, and output a comparison result, wherein the reference threshold is a difference value between the first target reference signal and the second target reference signal.