CANCELLATION OF PERIODIC NOISE IN LOW-LEVEL MAGNETIC SIGNALS

Authors
LESLIE KE SMALL GW SLOGGETT GJ
Citation
Ke. Leslie et al., CANCELLATION OF PERIODIC NOISE IN LOW-LEVEL MAGNETIC SIGNALS, Measurement science & technology, 6(8), 1995, pp. 1093-1098
Citations number
6
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Measurement science & technology → ACNP
ISSN journal
09570233
Volume
6
Issue
8
Year of publication
1995
Pages
1093 - 1098
Database
ISI
SICI code
0957-0233(1995)6:8<1093:COPNIL>2.0.ZU;2-F
Abstract
Cancelling periodic noise signals at the input to sensing systems sign ificantly eases the requirements for dynamic range, loop gain and slew rate. A method of cancelling mains-induced noise at the input to a SQ UID magnetometer has been demonstrated to reduce noise levels by 60 dB or more. The method has particular application when the magnetometer is used in an unshielded environment.