This circuit with TTL compatible output was found in a 1968 US documentation. The circuit is powered by 5 V and the frequency can be changed by changing the crystal.
This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms...
This 20W amplifier was found in 283 circuits from the 90s. The MOSFET admits equivalents. The...
This was the original title given by the publication of the 80s in which we found it. Similar...