FIELD: communication engineering. SUBSTANCE: device for commutating wide-band signals with communication matrix has input unit of amplifier-former for energizing input lines of the matrix. Input unit of amplifier-former is cut off through control input, when preset signal level is achieved in corresponding input line of the matrix. The signal provides reliable switching of communication element, connected with input line of the matrix. As a result, subsequent re-charge of input line of the matrix is prevented. EFFECT: improved reliability of operation. 4 dwg
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