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Current loop signal conditioning: Practical applicationsThis paper describes a variety of practical application circuits based on the current loop signal conditioning paradigm. Equations defining the circuit response are also provided. The constant current loop is a fundamental signal conditioning circuit concept that can be implemented in a variety of configurations for resistance-based transducers, such as strain gages and resistance temperature detectors. The circuit features signal conditioning outputs which are unaffected by extremely large variations in lead wire resistance, direct current frequency response, and inherent linearity with respect to resistance change. Sensitivity of this circuit is double that of a Wheatstone bridge circuit. Electrical output is zero for resistance change equals zero. The same excitation and output sense wires can serve multiple transducers. More application arrangements are possible with constant current loop signal conditioning than with the Wheatstone bridge.
Document ID
19950012320
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Anderson, Karl F. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1995
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-4636
NAS 1.15:4636
H-2026
Meeting Information
Meeting: 1995 Measurement Science Conference
Location: Anaheim, CA
Country: United States
Start Date: January 26, 1995
End Date: January 27, 1995
Accession Number
95N18735
Funding Number(s)
PROJECT: RTOP 505-63-50
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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