Abstract: The invention relates to a method for capturing an absolute rotational position of a shaft using at least two rotational material measures which are synchronously coupled to the shaft, comprising material measures with a different number of graduations which are each relatively prime in pairs, a determination of the state of the individual material measures by means of sensors, wherein a quantizable number of rotational states Ni is captured for each material measure, the total measurement range of the capture system is determined by the product N=?i=1 Ni of the possible states of all material measure, and each combination of states (a0, a1, a2, . . . , an) occurs exactly once within the total measurement range N, with the result that the absolute position of the shaft can be determined at any time from the combination of states of the material measures.

Abstract: In a photosensitive semiconductor diode device (1), in particular, a PIN diode device (2) for converting optical signals into electronic signals, the semiconductor diode is provided with a lead for contacting the doped regions and for electroconductively connecting them to a following circuit (11), e.g., an electronic amplifier. To realize a matching between the semiconductor diode and the following circuit that is effective over a wide bandwidth by means of a passive matching circuit (10), the lead contains the matching circuit such that lead (4, 5) is constructed on at least part of its length (L) as a coplanar line or a microstrip line such that conductor width (S) and/or conductor spacing width (gap width W) varies along its length area (L) of the lead, with the characteristic impedance of this lead varying along the corresponding part of the line. A very high operating frequency and a low signal attenuation are thereby achieved, among other things.