1 MHz bandwidth true NMR SQUID amplifier
| Autor: | S. L. Thomasson, C. M. Gould |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Physics
Magnetometer business.industry Circuit design Amplifier Bandwidth (signal processing) Electrical engineering Slew rate Integrated circuit Low frequency Condensed Matter Physics Atomic and Molecular Physics and Optics law.invention Nuclear magnetic resonance law General Materials Science business Direct-coupled amplifier |
| Zdroj: | Journal of Low Temperature Physics. 101:243-248 |
| ISSN: | 1573-7357 0022-2291 |
| DOI: | 10.1007/bf00754583 |
| Popis: | We have developed an integrated dc SQUID magnetometer with additional positive feedback (APF) for low frequency true NMR applications. The APF scheme allows direct coupled read out from the SQUID to room temperature electronics and eliminates the need for the conventional modulation scheme, thereby greatly simplifying the flux-locked loop electronics. We have configured our SQUID system for the specific needs of sensitive NMR measurements which include large bandwidth and high slew rate. We have achieved a bandwidth of 1.2 MHz and a slew rate greater than 105Φ0/s for frequencies above 10 kHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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