DUPLEX COMMUNICATION UNIT Russian patent published in 1996 - IPC

Abstract RU 2054803 C1

FIELD: wire communication engineering. SUBSTANCE: communication unit has line transformer 1, first, second, third, fourth, fifths, and sixths resistors 2, 3, 4, 6, 7, 8, respectively capacitor 5, operational amplifiers 9 and 10 on sensing and receiving ends, respectively, microphone 11, and dynamic loudspeaker 12. EFFECT: provision for loudspeaker communication with lines of different length connected, dispensing with balance adjustment; reduced influence of sending channel on receiving one. 1 dwg

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RU 2 054 803 C1

Authors

Antonov V.E.

Dates

1996-02-20—Published

1991-10-08—Filed