Pressure-sensitive amplifier stage comprising four unipolar pressure-sensor transistors each including a piezoresistive current path. The pressure-sensor transistors are connected as a pressure-measuring bridge having two bridge legs each comprising first and second pressure-sensor transistors which are connected in series. Two unipolar control transistors each has a control terminal and a current path arranged between a further first and a further second terminal. The respective first and second terminals of the two control transistors are connected in pairs, and the control terminals each is connected to a node between the pressure-sensor transistors. The interconnected second terminals are connected to the control terminals of the second pressure-sensor transistors of the two bridge legs. The control terminals of the first pressure-sensor transistors are adapted for connection thereto of a respective operating input voltage, and a measurement output voltage is detectable between the pressure-sensor transistors.