Title :
High-stability DC-current source using NMR lock technique
Author :
Sasaki, Hitoshi ; Miyajima, Akira ; Kasai, Naoko ; Nakamura, Hisao
Author_Institution :
Electrical Standard Division, Electrotechnical Laboratory, 1-1-4, Umezono, Niihari-gun, Sakura-mura, Ibaraki, 305 Japan
Abstract :
A high-stability constant current source has been developed using the nuclear magnetic resonance (NMR) field-frequency lock technique. The current is locked to the NMR frequency via the magnetic field of the electromagnet which has a highly stable coil constant. The current of 1 A has been stabilized to better than 0.2 ppm/h.
Keywords :
Circuit stability; Coils; Electromagnets; Magnetic fields; Nuclear magnetic resonance; Resistors; Thermal stability;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1986.6831785
