Simple circuit provides interface between normally incompatible voicecommunication lines. Circuit maintains 40 dB of isolation between input and output halves of four-wire line permitting two-wire line to be connected. Balancing potentiometer, Rg, adjusts gain of IC2 to null feed through from input to output. Adjustment is done on workbench just after assembly.
Two-Wire to Four-Wire Audio Converter
NASA Tech Briefs ; 7 , 3
1983-08-01
Miscellaneous
No indication
English
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