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AssigneeBalzers Aktiengesellschaft
InventorRudolf Stocker
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A method and apparatus for convening a measured signal which, at least in a first approximation, is related to a quantity of interest by the equation (a): ##EQU1## where y is the quantity of interest, x is the measured signal, and k, k.sub.N, k.sub.Z are constants, into a signal that is a function of the quantity of interest. The method implements the function (b): ln y=prop. ([ln (x-k.sub.N)-ln (k.sub.Z -x)]) wherein prop. means proportional, and where the function is implemented in an approximated manner by at least two bipolar transistors that have base emitter voltages that are dependent on collector currents of the bipolar transistors for receiving an output signal according to the equation (c): y'=ln y, with y' being the output signal.
A method for measuring a physical signal by tapping off an electric signal, whereby the physical signal depends on the electric signal as follows ##EQU17## wherein:
A measuring converter for converting a tapped off electric signal into an electric signal representing a physical signal to be measured, wherein said tapped off electric signal and said physical signal depend as follows:
Dependencies are inferred from the claim text.