An electronic commutator

This paper will discuss the design and performance of a very small electronic commutator which uses symmetrical transistors and subminiature cold cathode tubes. Three variations of the basic design have been built having sampling rates of up to 2000 per second. The error increases with temperature and source impedance; the maximum error at 25°C with 2 K ohms source resistance being 15 millivolts. (on 5.0 volt range). Transistors as defined current switches and environmental test on cold cathode tubes are part of the paper.