Method and apparatus for the determination of start time difference and overall phase shift between two signals
US4065665A · kind A · utility
7Cited by
2References
15Claims
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Key dates
| Filing date | Mar 8, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Mar 8, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method determines the time shift and total phase difference between two alternating current signals. A value .psi. (f) corresponding to the phase relationship between the two signals is determined for each frequency f contained in the two signals. A slope A and an ordinate section B of the best fitting straight line g(f)=Af + B through the totality of the values .psi. (f) so obtained is determined. The phase shift .psi..sub.o =B modulo (2.pi.) is determined from the ordinate section B and the time shift .tau. = A/2.pi. from the slope A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.