Low-dissipation tunable rf preamplifier for low temperature NMR applications
- 1 December 1978
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 49 (12) , 1622-1624
- https://doi.org/10.1063/1.1135358
Abstract
We describe a simple circuit which can be used as an impedance matching device to improve the S/N ratio when lossy cables must be used in low-temperature NMR experiments. The total dissipation is less than 2 mW and the circuit operates satisfactorily down to 1.5 K. The only tuned circuit is the nuclear resonance circuit which incorporates GaAs (P) diodes which can be tuned remotely.Keywords
This publication has 10 references indexed in Scilit:
- Miniature superconducting high frequency coaxial linesCryogenics, 1978
- Integrated circuit Robinson oscillator for NMR detectionReview of Scientific Instruments, 1977
- A stable low-level oscillator with cryogenic applicationsJournal of Physics E: Scientific Instruments, 1976
- Tunable low−temperature NMR oscillator for magnetic field measurementsReview of Scientific Instruments, 1975
- NMR Marginal Oscillator with MOS-FET Operating at Low TemperatureJapanese Journal of Applied Physics, 1973
- A Tunnel Diode NMR SpectrometerReview of Scientific Instruments, 1973
- Low Level Tracking Marginal Oscillator for in situ Magnetic Field Measurements at Low TemperaturesReview of Scientific Instruments, 1972
- Continuously Operating 4He Evaporation RefrigeratorReview of Scientific Instruments, 1971
- Liquid Helium Temperature cw NMR S/N Improvement Using a MOSFET rf AmplifierReview of Scientific Instruments, 1970
- Helium Cooled Radio Frequency Preamplifier for Use in NMRReview of Scientific Instruments, 1968