Voltage reference (CB8466E)

Found in a 90s General Electric documentation, this circuit has a drain current of just 1.5 uA. The load current is 200 uA.

High Impedance Microphone Preamplifier (CB18257E)
This high-gain circuit uses junction FETs (JFETs) and must be powered by somewhat high voltages. The...
Binary Display 7400 (CB22436E)
This circuit counts 1 per second, displaying the value in binary. The circuit is TTL and must be...
Sensitive Geiger Detector (CB5925E)
Critical components of this project are the Geiger tube and the 300V battery. The battery can be...