High bandwidth oscilloscope
AssigneeTeledyne LeCroy, Inc.
InventorsPeter J. Pupalaikis, David C. Graef
Life of this patent
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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.
Claims19
1-49. (canceled)
An apparatus to digitize a signal, the apparatus comprising:
- an input to receive an input analog signal;
- a splitter to split the input analog signal into at least a first split signal and a second split signal;
- a first digitizer to digitize the first split signal, wherein the first digitizer has a first bandwidth;
- a first frequency converter to convert a frequency range of the second split signal in a first conversion operation;
- a second digitizer to digitize the second split signal, wherein the second digitizer has a second bandwidth;
- a second frequency converter to convert a frequency range of the second split signal in a second conversion operation;
- and
- a combining unit to combine the first split signal and the second split signal mathematically to form a single output data stream that provides a substantially correct representation of the input analog signal,
- wherein the single output data stream has a bandwidth of frequency content that has been digitized using at least the first digitizer and the second digitizer, and
- wherein the bandwidth of the frequency content exceeds a bandwidth of the first digitizer and exceeds a bandwidth of the second digitizer.
Dependencies are inferred from the claim text.