Delay compensation apparatus

A delay compensation apparatus, comprising a first channel delay unit and a second channel delay unit, wherein the first channel delay unit is serially connected on a first channel, the second channel delay unit is serially connected on a second channel, and a delay of an input signal to the first channel is less than a delay of an input signal to the second channel, wherein:

• the first channel delay unit comprises a surface acoustic unit, and the surface acoustic unit comprises a first surface acoustic wave component and a surface acoustic output selection switch;
• the first surface acoustic wave component comprises an input end and p output ends, wherein p≥2;
• signal delay differences between the p output ends of the first surface acoustic wave component and the input end of the first surface acoustic wave component form an arithmetic progression whose first term is absolute delay duration T0 and whose common difference is relative delay duration t0;
• the input end of the first surface acoustic wave component is used as a signal input end of the surface acoustic unit, and the surface acoustic output selection switch selects one output end of the p output ends of the first surface acoustic wave component as a signal output end of the surface acoustic unit;
• and
• delay duration of the second channel delay unit is the absolute delay duration T0.