This circuit was taken from old American documentation. With it, it is possible to generate pulses like a Schmitt trigger, but using a tunnel diode.
This is the simulation of a Ultrasound Receiver using the 741 IC, an operational amplifier....
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
With this circuit it is possible to select the upper or lower side band on an SSB transmission by...