The Magnetic Analogue Shift Register Using the Preset Method
Yoshiaki Tadokoro, Takeshi Anayama · Transactions of the Society of Instrument and Control Engineers · 1972
This paper describes a method for the construction of the analogue shift register suitable for sampled-data systems. The magnetic cores are capable of isolating the input circuits from the output circuits, and have high reliability in a wide range of environmental conditions. As explained in this paper, the analogue delay elements which are basic units for the shift register are constructed by these cores.An analogue delay element consists of one core and one flip-flop circuit. This type of delay element is superior to the push-pull type using two cores, because it circumvents the problem of core matching. The input signal is divided into its polarity and absolute value. They are shifted by the binary shift register using flip-flop circuits and by the delay elements using cores, respectively. The errors occurred in the core are compensated by the preset method in which the adaptive value is written-in to the core before the write-in of the signal, and its value can be adjusted for the compensation of errors in every delay element. This method can reduce the number of the cores to half and simplify the adjustment of the readout and write-in characteristics of the delay elements as compared with the push-pull method. As a result, this delay element is simple in construction and has an accuracy of 0.025%.The difference analyzer is constructed as an application of this shift register. It is made clear that this device is suitable for the study of sampled-data systems.