3) Excitation oscillator contains less than 1 per cent second harmonic, which in turn is attenuated 80 dB by filtering. ... excitation current wave it is possible to get a pure sine wave second harmonic output which greatly increases the signal-to- noise ratio of the device. ... 4) A description of the helical core sensor is given together with circuit diagrams of the electronics. Schmitt, O.H. Unbalanced magnetometer. U.S. Patent, 2, 560, 132, July 10, 1951. ... Serson, P.H., and W.L.W. Hannaford.
|Title||:||Publications of the Dominion Observatory|
|Author||:||Dominion Observatory (Canada)|