Abstract: The disclosure is related to an electronic circuit for a field device of automation technology, comprising: a first digital processor having a first set of machine commands for executing an algorithm running in the processor, wherein the first processor is adapted to execute a test algorithm to calculate output data, wherein the test algorithm uses for calculating the output data at least a part of the first set of machine commands, which are used for executing the algorithm, a second digital processor having a second set of machine commands for executing at least one verification algorithm, wherein the second processor is adapted to execute the verification algorithm to calculate verification data, and wherein the electronic circuit including the second processor is adapted, based on the output data calculated by the first processor and the verification data calculated by the second processor, to perform a checking of the first processor.

Abstract: A high-precision pressure sensor, having a first base body that has two electrically conductive layers and an insulation layer arranged between the two layers and electrically insulating the two layers from one another, an electrically conductive measurement membrane arranged on the first base body with inclusion of a pressure chamber, which measurement membrane can be charged with a pressure to be measured, and an electrode provided in the membrane-facing layer and spaced apart from the measurement membrane, which electrode together with the measurement membrane forms a capacitor having a capacitance that varies according to the pressure acting upon the measurement membrane.

Abstract: A signal generator for producing periodic signals for a measuring apparatus of automation technology. The signals have sequential, discrete signal frequencies, which lie within a predetermined frequency range. A control- and/or computing unit, a clock signal producer are provided, wherein the clock signal producer provides a constant sampling frequency, which is greater than the maximum discrete signal frequency in the predetermined frequency range. A memory unit is provided, in which for each of the discrete signal frequencies the amplitude values of the corresponding periodic signals are stored or storable as a function of the sampling frequency. The control- and/or computing unit reads out the stored or storable amplitude values of the discrete frequencies successively with the sampling frequency of the clock from the memory unit and produces the periodic signals, or forwards for producing.

Abstract: A high-precision pressure sensor, having a first base body that has two electrically conductive layers and an insulation layer arranged between the two layers and electrically insulating the two layers from one another, an electrically conductive measurement membrane arranged on the first base body with inclusion of a pressure chamber, which measurement membrane can be charged with a pressure to be measured, and an electrode provided in the membrane-facing layer and spaced apart from the measurement membrane, which electrode together with the measurement membrane forms a capacitor having a capacitance that varies according to the pressure acting upon the measurement membrane.

Abstract: The invention relates to a signal generator for producing periodic signals for a measuring apparatus (1) of automation technology, wherein the signals have sequential, discrete signal frequencies, which lie within a predetermined frequency range, a control- and/or computing unit (4), a clock signal producer (6), wherein the clock signal producer (6) provides a constant sampling frequency, which is greater than the maximum discrete signal frequency in the predetermined frequency range, a memory unit (7), in which for each of the discrete signal frequencies the amplitude values of the corresponding periodic signals are stored or storable as a function of the sampling frequency, wherein the control- and/or computing unit (4) reads out the stored or storable amplitude values of the discrete frequencies successively with the sampling frequency of the clock (6) from the memory unit (7) and produces the periodic signals or forwards for producing, and a static filter unit (12) with a limit frequency, which lies above