KME3

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KME3 modules 2336 and 2337
KME3 module 2337 from above; Width 27 mm, thickness 4.5 mm, height without pins 12 mm; manufactured in December 1989

KME3 is a circuit series ( hybrid circuits in thin-film technology ), based on DTL circuit technology , which was built in the 1960s at VEB Keramische Werke Hermsdorf (today Tridelta ). It was a glass substrate on which resistors and interconnects were vapor-deposited as a metal coating. The resistors were then given a meander shape by electron beam engraving to increase the resistance value. The active components such as transistors and diodes were soldered on as mini plastic variants. Other components were connected externally. The glass substrate was encapsulated with silicone rubber in an aluminum cup that had two pins for the ground connection .

The circuits essentially provided gate and flip-flop functions that could be extended externally by connecting diodes in their inputs. However, analog components (amplifier circuits) were also produced.

The locomotives of the 155 series run with a control made up of these circuits. The coin telephones SWFV Mü69 of the GDR Deutsche Post were also equipped with it. At ROBOTRON , the KME3 circuits in the R21 and the control cabinets were used for the removable disk storage (around 1972). The production for replacement needs was still carried out in small numbers at the end of the 1980s (see imprint "XD" on module 2337 in the photo above).

Individual evidence

  1. ↑ KME technology . robotron technik .de. February 24, 2015. Accessed October 24, 2017.
  2. ↑ Digital circuits - KME3 technology . Rudiger Rennert. Retrieved October 24, 2017.
  3. ↑ Klaus K. Streng, abc of electron tubes and semiconductor components , military publishing house of the GDR 1973
  4. ^ SWFV Mü 69 (GDR) . Archived from the original on December 12, 2013. Retrieved October 24, 2017.
  5. ↑ Gerd Heinz: Imprint of GDR circuits. Retrieved November 7, 2018 .