Abstract: A temperature measuring arrangement employs a semiconductor element whose internal resistance depends on the temperature and the current direction and which is driven by an a.c. signal from an a.c. signal source. A measuring device determines the difference in semiconductor element conductivity depending on the polarity of the applied a.c. signal to provide an indication of the temperature being measured.

Abstract: A photosensitive semiconductor resistor has a monocrystalline semiconductor body of one conductivity type which, on two oppositely located surfaces, is provided with an anode contact and with a cathode contact, and is constructed so that the cathode contact is a highly doped zone of the same conductivity type as the semiconductor body. The semiconductor body can be exposed to photon radiation at its surface supporting the cathode contact and the area of the anode contact is at least 1000 times larger than the area of the cathode contact. Such a photosensitive semiconductor resistor is easy to manufacture and has both a low inertia and a good sensitivity.