立体形フェライト磁心を用いたアナログメモリの実験的検討

概要

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We has investigated a pulse width modulator (PWM) which is composed of two-hole magnetic core laminated by permalloy sheets and is read out nondestructively by square wave voltages of 50 Hz.　In connection with this, this paper deals with a nondestructive readout analog memory using U type cubic ferrite core. First, the write-in and readout methods for unipolar analog signals are experimentally discussed. The linearized characteristics of output pulse width vs input voltage are within 0.5% of the maximum output pulse width, and the maximum percentage difference of the memory holding characteristics can be made within +0.6% for 3,000 times of the readout.　Further, the storage of bipolar analog signals is achieved by using a single cubic type core without push-pull connecting a pair of magnetic core. The sum and the remainder between bipolar analog signal and bias voltage are stored in two legs of cubic type core respectively, and stored flux levels are read out differentially. Then the polarity of output pulse in the first readout corresponds to that of input signal.
山形大学の論文
1978-02-20