A novel equivalent sampling method using in the digital storage oscilloscopes

The random equivalent sampling and sequential equivalent sampling are two equivalent sampling methods widely used in the Digital Storage Oscilloscopes. A novel equivalent sampling method which is called compound equivalent sampling is proposed in this paper. The method combines the high-speed of the random equivalent sampling with the high efficiency of the sequential equivalent sampling and can perform rapid and effective measurement for the periodic signal which is either fast-varying or slow-varying. The circuit using this method is also able to take real-time sampling to the single-shot signals