✦ LIBER ✦
Mains noise suppression for SQUID biomagnetic measurements using a phase-sensitive detector technique
✍ Scribed by R.J. Prance; H. Rushby; M.W. Potts; M. Moore; T.D. Clark
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 308 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
Mains (50 Hz) pickup in .SQUID magnetometers used for l~'omagnetic measurements on the human body is a well known problem, particularly when the SQUID is used in an unshielded environment_ We describe a simple phase-zensitive detector system which will suppress this undesirable 50 Hz signal by up to 45 dB, depending on the level of the 50 Hz signal.