RESISTANCE BRIDGE AND ITS USE IN CONVERSION SYSTEMS

摘要

An electrical network creates a differential voltage signal and comprises a plurality of first impedance elements of substantially equal values which are connected to form an impedance bridge. The impedance of at least one of the first impedance elements changes in response to at least one selected external con dition to which the first impedance elements are exposed. The network also comprises a second impedance element which has two nodes. The second impedance element i s connected at these nodes between a first pair of the first impedance element s. The differential voltages are measured between these nodes and between another n ode or nodes with magnitudes and signs being dependent upon the change in the imped ance of the first impedance elements.