Abstract: An improved piezoresistive pressure sensor or an improved piezoresistive pressure pickup having a pressure measuring cell (13), a transmission diaphragm housing (7), which comprises a jacket housing section, a transmission diaphragm (17) and a backplate (21) and having a fluid pressure chamber (19) situated on the measuring diaphragm side is distinguished by the following featuresthe jacket housing section of the transmission diaphragm housing (7) comprises a pressure chamber sleeve (33),the pressure chamber sleeve (33) and the backplate (21) consists of weldable steel,the transmission diaphragm housing (7) and thus the pressure chamber sleeve (33) are or can be inserted in an annular recess (31) in the connection housing (3) in a sealing manner,the connection housing (3) consists of a material which cannot be welded or cannot easily be welded, andthe pressure chamber sleeve (33) and the backplate (21) are permanently welded in a sealing manner so as to seal off the pressure transmission medium provided in th

Abstract: A measurement circuit for carrying out a method of compensation, in particular for a piezoresistive pressure transducer with a measurement bridge (7) and a following output/differential amplifier (15) further comprises a current supply circuit (13). To enable an optimal temperature compensation for the measurement bridge (7) with maximum resolution of the pressure measurement signal, a digitalized compensation circuit with an analog/digital converter (21), a memory (23) and at least one digital/analog converter (25, 27) is connected ahead of the output/differential amplifier (15). The temperature dependent voltage difference/input signal at the measurement bridge (7) is digitalized via the following converter (21) and converted to compensation values stored in the memory (23). These values are converted into an analog compensation signal in a converter (25, 27). For analog measured value determination per se, only error compensation is carried out in digitalized fashion (FIG. 2).