Simultaneous Measurement of Two Parameters by Double Current Supplied Bridge
Adam Idźkowski, Jarosław Makal, Z. L. Warsza · 2012
A four-terminal (4T) bridge-circuit, with two voltage outputs is presented. This circuit, named as double cur-rent bridge is supplied by two equal current sources con-nected in parallel to opposite arms (2J) or by one such source switched between those arms (2x1J). Two output voltages from bridge diagonals as functions of arm re-sistance increments in absolute and in relative units are given. Also the example of this bridge application is pro-posed. Signal conditioning formulas of two-parameter measurement on the example of strain and temperature are discussed in detail. Some results obtained with the use of this bridge-circuit are briefly described.