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Two-Wire to Four-Wire Audio ConverterSimple 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.
Document ID
19830000003
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Talley, G. L., Jr
Seale, B. L.
Date Acquired
August 11, 2013
Publication Date
August 1, 1983
Publication Information
Publication: NASA Tech Briefs
Volume: 7
Issue: 3
ISSN: 0145-319X
Subject Category
Electronic Components And Circuits
Report/Patent Number
KSC-11256
Accession Number
83B10003
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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