This circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and a half digits being powered by a voltage of 9 V.
This circuit is based on the Texas Instruments LMC662 and has the function of monitoring the audio...
Yes, tunnel diodes can also be used in voltage regulators, as shown in this circuit from a Radio...
Based on operational amplifiers of the time, this circuit from the 1980s has high input impedance. The...