Patent · US Active

Cross-path phase calibration for high dynamic range data acquisition

US9341503B2 · kind B2 · utility

3Cited by

7References

17Claims

0Family size

Assignee

Crystal Instruments Corporation · US

Inventors

James Q. Zhuge · Palo Alto, US
Zhengge Tang · San Jose, US
Lei Chen · South Windsor, US

Key dates

Filing date	Oct 18, 2013
Grant date	May 17, 2016
Priority date	—
Expiry date	Jul 31, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01D9/005
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a data acquisition instrument with dual A/D converters in each measurement channel, phase corrections between the paths are computed using a locally generated calibration signal. The calibration signal goes through dual paths simultaneously and is stitched into a single signal for analysis by a processor running a Fourier transform where phase differences are easily identified and used to establish a phase correction signal applied to a single master clock supplying clock signals to both paths. A switch allows the calibration signal to be applied to each channel or to no channels when actual data is being collected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.