GB1150242A - Improvements in or relating to Electric Circuit Arrangements. - Google Patents

Abstract

1,150,242. Coders. SIEMENS A.G. 27 June, 1967 [28 Jan., 1966], No. 4104/67. Heading G4H. A coder comprising a first set of line loops a<SP>1</SP>-a<SP>3</SP> ... b1-b3 (Fig. 2) and a second set of line loops 11 . . . In with inductive couplings connecting selected pairs of the loops is such that input pulses applied to one or more of the first set of line loops, e.g. via transformers Ua1 . . . Ub3 induce an output pulse in one of the line loops 11-1n of smaller amplitude than the pulses induced in the remaining loops. The line loops 11-1n are connected to the primary windings of transformers U1 . . . Un which are initially set to one of two possible remanence states by a recording pulse Ej and all but one of which are set to the other state by the pulses produced in the line loops 11-In so that when a sampling pulse Aj is applied, only the transformer associated with the selected line loop changes state to induce an output pulse in the secondary winding of the transformer. The coder may be connected to a decoder comprising two further sets of line loops 21-2n and A, B . . . X similarly interconnected by inductive coupling elements so that small amplitude pulses are induced in some of the loops A-X the smaller amplitude pulses representing the information in recoded form and being transmitted by further transformers Ua-Ux to output windings wB-wX. In the embodiment of Fig. 3 the coder and decoder may be used in either direction input pulses on the winding alw . . . b3w resulting in output pulses being induced on selected ones of the windings wA . . . wX and input pulses on the windings Aw . . . Xw inducing pulses on selected ones of the output windings wal . . . wb3.