GB1018614A - Improvements in or relating to magnetic logic "or" gates - Google Patents

Abstract

1,018,614. Circuits employing bi-stable magnetic elements. PLESSEY CO. Ltd. June 29, 1962 [March 30, 1961], No. 11805/61. Heading H3B. A magnetic logical device includes two multiple aperture cores A 1 , A 2 which have their output windings 9A, 9A 2 connected in series with the input winding 7B of an output core B. The " OR " device of Fig. 6 has two inputs, one each to cores A 1 and A 2 , an input setting the core from the " 0 " state (Fig. 2A) to the " 1 " state (Fig. 2B). A primary pulse is then applied to A 1 and A 2 followed by a clearing pulse which causes core B to switch if either or both cores were set to the " 1 " state. The " primed 1 " state is shown in Fig. 2C. In the embodiment of Fig. 7 an N-input " OR " device has two output apertures in each core to cancel out the spurious outputs produced by a clearing pulse passing through a core in the " 0 " state (Fig. 1). The number of turns on an output winding is greater than that on an input winding to compensate for losses in the system.