Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2009-12-22
2011-12-06
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C702S075000, C702S076000, C341S155000, C341S126000
Reexamination Certificate
active
08073656
ABSTRACT:
A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content.
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Graef David C.
Pupalaikis Peter J.
Kessler Gordon
LeCroy Corporation
Wachsman Hal
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