Abstract: Device for conversion of a nonelectrical quantity into an electrical signal comprises measuring and compensating bridge circuits whose supply arms are connected to a power supply. A nonelectrical quantity like strain, force or pressure acts on the input of the measuring bridge circuit whose output is coupled to the input of a measuring circuit. The effect of destabilizing factors, such as temperature, electromagnetic field or aging of device components, is reduced by a suitable compensating bridge circuit whose output is connected to the input of a correction circuit. The measuring bridge circuit is one arm of the compensating bridge circuit. The correction circuit has differential outputs coupled to adjustable dividers whose number is equal to the number of compensating couplings introduced. Outputs of the dividers are connected to a displacement unit and to a device functional characteristic scaling circuit.

Abstract: A semiconductor strain gauge transducer comprising a sensitive element which is a monocrystal sapphire substrate carrying epitaxial silicon strain gauges of p-type conduction. The hole concentration in the silicon is 3.5.multidot.10.sup.19 to 3.multidot.10.sup.20 cm.sup.-3. The silicon strain gauges are interconnected to form a bridge or differential strain-sensitive circuit.