Abstract
D.G. Scorgie and A.D. Schnitzler published papers describing the derivative amplifiers with magnetic core. There remain, however, some unsolved problems concerning the method of detecting only the variation of input and concerning the commutation phenomenon.
The authors reported on two types of magnetic amplifiers for detecting rotating acceleration. These amplifiers can detect the variation of rotating speed by taking the difference in the widths of pulses at the output gates of the first stage amplifiers and the second stage amplifiers. The authers investigated the static characteristics of these amplifiers by using the equivalent circuits based on controlling magnetization curve.
This paper describes the dynamic characteristics of duodirectional DC input type circuit, which are analyzed by representing the action of this circuit by a difference equation and by applying Z-transform to this equation. Almost the same results are obtained in the calculation as in the experiment of the frequency characteristics. It is shown how the saturation flux and the ascending value of flux after resetting affect a detectable low frequency, when the sinusoidal voltage is applied to the input of this circuit.
