Papers by Keyword: High Frequency Excitation

Abstract: Studied the OVERHAUSER magnetometer signal's production mechanism and instrument's working principle, designed high frequency energizer, DC polarization circuit and signal detecting circuit. Detecting circuit was composed of the analog frequency selective amplification, narrow-band filter, programmable amplifier and controller. In setting conditions, the probe output Larmor precession signal, then collected the signal by the detecting circuit. The results show the single identified with the theoretical analysis with a higher SNR. Provided an important basis for the increase of the system sampling rate by analysising the relationship between the poling time and the output signals amplitude.