DEVICE FOR AUTOMATICALLY CHECKING THE 7 A2-TYPE DECIMAL TRANSMITTER CIRCUIT IN THE PENTACONTA TELEPHONE EXCHANGE

摘要

the invention refers to a static circuit frame of tones, calls, and supplies cadente tensions for automatic telephone stations.the frame is composed of a static generator voltage sine power consist of two identical amplifiers with a floor out cvasicomplementar provided a negative reaction and aexit resistance small, absolutely necessary for generators to work with task variable.