Found in documentation from the 1980s, this highly sensitive circuit is based on the conduction by the presence of gas from an ionization chamber. The components are from the time.
This circuit of a 1969 Electronic Design uses RTL logic. The setting can be adapted to TTL. The...
This was the original title given by the publication of the 80s in which we found it. Similar...
This crystal oscillator circuit is indicated for use as a frequency reference in the calibration...