DISCRETE FOURIER CONVERSION CIRCUIT

摘要

PURPOSE:To obtain an arithmetic section of a desired discrete Fourier conversion, by realizing the effective application for the duration of an input signal in a Fourier conversion which is used to digitize a signal receiver in accordance with the time sharing of the channel of a telephone switchboard. CONSTITUTION:An input signal of duration 2T0 is produced at the starting point of an arithmetic section A and supplied through a terminal 1. This input signal is multiplied by a neucleus supplied from a neucleus producing circuit 7 and through multipliers 31 and 32. The results of these multiplications are totalized by a totalizer comprising adders 41 and 42 plus a 1-sampling section delaying registers 51 and 52. This totalization is reset by gates 61 and 62 and with every t0/2 duration of each minor section.