Spectrographic analysis of materials
US3999118A · kind A · utility
9Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Feb 27, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4625
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In nuclear magnetic resonance apparatus employing detection channels in phase quadrature an excitation-pulse transmitter includes an arrangement of switches and associated delay lines to enable successive pulses to be produced in phase quadrature and alternate pulses to be produced in phase opposition. The receiver output signals corresponding to the quadrature pulse-pairs may then be processed to cancel the effects of phase error and unequal gain in the detection channels and the signals corresponding to the opposing pulse-pairs may be processed to cancel systematic noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.