Electronic bridge amplifier for measurement impedance bridges, has bridge branch with central tap resting at zero potential using current-voltage converter

摘要

An excitation voltage is supplied to a node of a measuring bridge used in the electronic bridge amplifier. The potential is adjusted in comparison with the lying nodes, such that the central tap rests at zero potential. The central tap of other bridge branch is held at zero-potential using a current-voltage converter. An Independent claim is also included for the arrangement of the measuring bridge circuits for summation or subtraction of parameter registered in measuring bridges.