TWO-PARAMETER MEASUREMENTS AND SIGNAL CONDITIONING IN DOUBLE-CURRENT SUPPLY FOUR-TERMINAL RESISTANCE CIRCUITS
Journal Title: Metrology and Measurement Systems - Year 2006, Vol 13, Issue 1
Abstract
A new type of the four-terminal (4T) bridge circuit unconventionally supplied by current sources connected in parallel to opposite arms, named double current bridge (2J) is presented. It has two different outputs from both diagonals. Three variants of such circuit are proposed. Their output voltages are given as functions of arm resistance increments in absolute and in relative units . Signal conditioning formulas of the two-parameter (2D) measurement of these increments and also of two external variables differently influencing them are discussed in detail. First results of instrumentation designed experimentally using 2J bridge circuits are shortly presented. A summary and prospective applications of 2J bridge circuits in multivariable measurements are given. Literature is included.
Authors and Affiliations
ZYGMUNT WARSZA
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