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Convention Paper

Common-Mode to Differential-Mode Conversion in Shielded Twisted-pair Cables (Shield-Current-Induced Noise)

Authors: Brown, Jim; Whitlock, Bill

AES Convention 114 · Paper 5747 · March 2003

Abstract

Neil Muncy has shown that audio frequency current flowing on the shield of balanced audio wiring will be converted to differential mode voltage by any imbalance in the transfer impedance of cables, and hypothesized that the effect increases linearly with frequency. Whitlock has shown that conversion also occurs with capacitive imbalance. This paper confirms Muncy's hypothesis, and shows that shield current induced noise can be significant in the MHz range.

Details

Published in
AES Convention 114
AES Convention
114
Paper number
5747
Publication date
March 6, 2003
Session subject
Automotive Audio; Instrumentation and Measurement
Affiliation
Audio Systems Group, Inc. Chicago, IL, ; Jensen Transformers, Inc., Van Nuys, CA (See document for exact affiliation information.)
Type
Convention Paper