Equivalent Sampling Oscilloscope with External Delay Embedded System

The internal delay methods for sequential equivalent sampling are widely used in the digital storage oscilloscope and limited completely by maximum operating frequency of embedded system. A new external delay technology for equivalent sampling oscilloscope is presented in this paper. The technology is based on the external programmable delay chips, which provide much shorter delay time for equivalent sampling rate as well as much higher operating frequency. With real time sampling and equivalent time sampling, the embedded system could perform rapid and effective measurement for the periodic signal which is either fast-varying or slow-varying and also be able to take real time sampling to the single-shot signals.