Oscilloscope system and method for simultaneously displaying zoomed-in and zoomed-out waveforms

摘要

An oscilloscope system includes a current probe, a processing unit and a display unit. The current probe includes a high and low gain signal paths for receiving simultaneously a signal of interest from a device under test (DUT), and to output amplified small and large current portions of the signal of interest, respectively. The processing unit receives first and second digitized data corresponding to the amplified small and large current portions output by the high and low gain signal paths, respectively, and processes the first and second digitized data for display as zoomed-in and zoomed-out waveform data, respectively. The display unit displays simultaneously a zoomed-in waveform in a first display window, based on the zoomed-in waveform data, and a zoomed-out waveform in a second display window, based on the zoomed-out waveform data, using the same time scale. The small current portion is less than a predetermined threshold.

主权项

1. An oscilloscope system comprising:
a current probe comprising a high gain signal path and a low gain signal path configured to receive simultaneously a signal of interest from a device under test (DUT) and to output an amplified small current portion of the signal of interest and an amplified large current portion of the signal of interest, respectively; a processing unit configured to receive first digitized data corresponding to the amplified small current portion of the signal of interest output by the low gain signal path and second digitized data corresponding to the amplified large current portion of the signal of interest output by the low gain signal path, to process the first digitized data for display as zoomed-in waveform data, and to process the second digitized data for display as zoomed-out waveform data; and a display unit configured to display simultaneously a zoomed-in waveform in a first display window, based on the zoomed-in waveform data, and a zoomed-out waveform in a second display window, based on the zoomed-out waveform data, using the same time scale, wherein the small current portion of the signal of interest is less than a predetermined threshold.