Research on a High-Precision Delay Circuit in Data Acquisition Systems

摘要

This paper presents a novel precision delay circuit design for high-speed data acquisition systems. Many studies have suggested that various advanced electronic measurement apparatuses require that the delay circuit should have a high precision and a short delay interval. Practically, however, such measurement apparatuses are low in precision and long in delay interval at present. The structure and function of a data acquisition system is introduced first; then the principle of ramp-based precision delay circuits and the digitally programmable delay generator is studied and the precision delay circuit is designed. The authors also demonstrated 8-bit programmable delay circuits with a timing precision of 10 ps. Therefore the programmable precision delay circuit here presented has a higher precision, shorter interval and more detectable function than any other precision delay circuit.