This circuit uses two diodes in a doubling configuration to receive medium-wave range signals. The phone is crystal. We found it in a 1968 American documentation.
In the figure we have a practical circuit for a 50 kHz bandwidth amplifier using a photo diode as...
This circuit consists of a small inverter that can generate a few hundred volts of DC voltage...
Found in a 1967 Electronic Design, this transistorized circuit compresses and then expands a pulse....