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US 2009/0015453 A1Published application
High speed arbitrary waveform generator
AssigneeLeCroy Corporation
InventorPeter James Pupalaikis
Life of this patent
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Abstract
A high-speed arbitrary waveform generator (AWG) that utilizes multiple digital-to-analog converters (D/A converters) and overcomes bandwidth limitations of individual D/A converters to produce high-speed waveforms.
Claims32
An apparatus for generating signals comprising;
- a plurality of digital-to-analog converters, each having a bandwidth and each producing a D/A output signal;
- at least one upconverter, the at least one upconverter receiving a D/A output signal and producing an upconverted signal;
- and
- a combining element that receives and combines at least one D/A output signal and at least one upconverted signal and produces a final output signal;
- whereby the final output signal includes spectral content occupying a substantially contiguous frequency band whose width is greater than the bandwidth of any one of the plurality of digital-to-analog converters.
2 more elements
A method for generating a, signal, comprising the steps of:
- digital-to-analog converting a low frequency portion of a desired waveform to generate a lower frequency analog signal;
- digital-to-analog converting a lower frequency version of a higher frequency portion of the desired waveform to generate an analog lower frequency version of the higher frequency portion of the desired waveform;
- mixing the analog lower frequency version of the higher frequency portion of the desired waveform with a signal from a local oscillator to generate a higher frequency version thereof;
- and
- combining the low frequency analog signal and the analog higher frequency version of the higher frequency portion of the desired waveform to generate a combined analog waveform.
2 more elements
An apparatus for generating signals comprising;
- a plurality of digital-to-analog converters, each having a bandwidth and each producing a D/A output signal;
- at least two upconverters, each upconverter receiving a D/A output signal from one of the plurality of digital-to-analog converters and producing an upconverted signal;
- and
- a combining element that receives and combines the at least two upconverted signals and produces a final output signal;
- whereby the final output signal includes spectral content occupying a substantially contiguous frequency band whose width is greater than the bandwidth of any one of the plurality of digital-to-analog converters.
2 more elements
Dependencies are inferred from the claim text.