This circuit was found in an Elektor from the 90s. The circuit uses common components even today, requiring a symmetrical power supply.
This passive tuned circuit was found in a 90s Popular Electronics. The coils must be according to the...
In the figure we have the simple way to obtain a digital inverter using a general-purpose...
This circuit was found in the March 1990 issue of Radio Electronics magazine. The circuit can be...