Low‐dissipation tunable rf preamplifier for low temperature NMR applications
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 nucl...
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| Veröffentlicht in: | Review of scientific instruments 1978-12, Vol.49 (12), p.1622-1624 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | 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. |
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| ISSN: | 0034-6748 1089-7623 |
| DOI: | 10.1063/1.1135358 |