Abstract: An a.c.-fed temperature measuring bridge in the form of a balanced Wheatse bridge containing a temperature sensor R(.theta.) which, depending upon the measured temperature .theta., generates an output voltage which is balanced by a variable voltage y provided by ohmic ratio arms in such a way that if the sensor R(.theta.) has a non-linear characteristic, there will still be a linear relationship such that .theta. = const..sup.. y, the inventive feature being that the fixed ratio arms of the balanced Wheatstone bridge are formed by an inductive potential divider and that for correcting the non-linearity of the sensor the voltage across the variable ohmic ratio arms is a predetermined ratio (O.sub.3) of the voltage feeding the bridge.

Abstract: A compensating bridge circuit is used for measuring physical quantities dctly. The circuit comprises an unbalanced Wheatstone bridge having a quantity-dependent voltage at an output thereof. An ohmic potential divider circuit produces a divisional voltage for compensating the quantity-dependent voltage. The divider circuit includes two resistances one of which is variable. An input voltage is fed to the Wheatstone bridge and a supply voltage is provided to the potential divider circuit. The supply voltage is composed of the bridge input voltage and the divisional voltage whereby, when the circuit system is balanced, the relationship between an input quantity x and a balancing quantity y is linear.