GB829794A - Improvements in or relating to counter devices - Google Patents

Abstract

829,794. Circuits of bi-stable magnetic elements. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Jan. 20, 1958 [March 15, 1957], No. 8599/57. Class 40 (9). [Also in Group XIX] A counter or frequency divider comprises a plurality of counter stages each consisting of a magnetic core counting ring and has auxiliary cores acting to transfer pulses between the counter stages. As shown, Fig. 2, a binary counter comprises stages such as A each comprising two cores A1, A2, coupled bidirectionally by R-C delay networks A11, A13, are interconnected by transfer cores ABC. Input pulses at the terminals CPN are supplied at a frequency nF, where n is the number of stages, to all the transfer cores such as ABC, and to a frequency-divider N, F being the rate at which the first stage A is supplied with pulses. Initially the first cores A1 of each stage are in the " 1 " state, and the second cores A2 are in the " O " state, the auxiliary cores ABC being in the " O " state. Pulses supplied to the terminals CPN tend to switch the cores to the " O " state. In a modification (Fig. 3, not shown), the auxiliary cores ABC and an additional input core for the first stage are fed sequentially from a circulating stepping register.