Synchronism detector circuit

摘要

A synchronism detector circuit wherein it is arranged so that two a.c. voltages the synchronism of which is to be determined are converted, respectively, into rectangular pulses, which pulses trigger a pair of one-shot multivibrators, respectively, the logical product of the outputs from these one-shot multivibrators is provided, and the thus provided logical product causes signals indicating the states of synchronism between the a.c. voltages to be output.