Patent ID: 8456165
Filing Date: 2013-06-04
Classification: G01R

Abstract:
1. A device for highly precise synchronization of an NMR transmission frequency to a resonance frequency of an NMR line while taking into consideration a non-constant RF phase, the device comprising: an RF generator having a frequency f an NMR transmission and reception system, said NMR transmission and reception system using an RF signal from said generator to produce a train of excitation pulses having a repetition frequency f a first control loop, said first control loop synchronizing said frequency f a second control loop, said second control loop having a phase shifter that rotates a radio-frequency phase of said NMR transmission and reception system in said first control loop by a value Δφ, said phase shifter being controlled in said second control loop via an input signal produced by a signal extraction stage, said signal extraction stage extracting a saw-tooth AC component of the signal U