DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers

Patent · Tue Oct 19 00:00:00 EDT 1993

OSTI ID:5299940

Fan, N Q; Clarke, J

A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.

• DOE Contract Number: AC03-76SF00098
• Assignee: Univ. of California, Oakland, CA (United States)
• Patent Number(s): US 5254950; A
• Application Number: PPN: US 7-759997
• OSTI ID: 5299940
• Resource Relation: Patent File Date: 13 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
NMR SPECTROMETERS
DESIGN
AMPLIFIERS
NMR SPECTRA
SQUID DEVICES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
SPECTRA
SPECTROMETERS
SUPERCONDUCTING DEVICES
440800* - Miscellaneous Instrumentation- (1990-)
665412 - Superconducting Devices- (1992-)