| 摘要 |
Embodiments of the present invention provide improved techniques for sampling events in electrical test equipment such as real-time oscilloscopes. A circulating resampling digitizer uses a delay loop to repeatedly acquire replicas of an input event. The replicas are used to create a series of events which may be output or stored in memory. Signal reconstruction techniques such as interleaving and/or averaging may be applied to the series in order to construct a digital representation of the original input event. The resulting representation may have a higher sample rate, lower noise, and higher vertical resolution than each event in the series. The disclosed techniques use low cost components and can be added to existing instruments with little or no modification. |
