GB837212A - Improvements in gating circuits employing saturable magnetic cores - Google Patents

Abstract

837,212. Magnetic amplifiers. SPERRY RAND CORPORATION. Oct. 26, 1956, No. 32745/56. Class 40 (9). Two load impedances are connected in series with a source of spaced power pulses, one of the loads being shunted by at least two windings of two saturable cores, each of which has a control winding such that by changing the state of one or both cores between power pulses the pulses may be switched from energizing one load to energizing the other. In Fig. 4, load 40 is shunted by windings of saturable cores 42 and 43 in series. If both cores are saturated to present low impedance to pulses from the source PP load 40 is by-passed and an output appears across load 41. If during an interval between pulses from PP one or other of the cores is switched by a Source SS to present high impedance to source PP, load 40 becomes energized and load 41 is cut-off. Rectifier 34 and negative potential source 32 isolates load 41 when load 40 is energized. A pulse from PP as well as energizing load 40 also returns the switched core back to its initial state. If both cores 42 and 43 were switched together, the pulse from PP would be insufficient to reset both cores. Both cores may be restored if additional windings are provided in parallel with the windings 45 and 47, but not in series with load 41 or in shunt with load 40. If the additional windings are in series with a high resistance so that the current drawn from source PP is substantially constant, either one or both cores can be switched in the space of one pulse. As shown in Fig. 9, the load 40 may be shunted by windings in parallel in which arrangement both cores. must be switched to energize load 40. Any parallel series connection of any number of windings may be used to shunt the load 40 and additional load impedances may be included in the series shunt circuits, see Figs. 10, 11, not shown. Some of the cores may carry two windings in the path of pulses from PP, one of the windings being in shunt with one load and the other being in shunt with another load while each has its separate series circuit, see Fig. 12, not shown. The control windings may be continuously biased to reverse the core states unless inhibited by an input signal.