Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The crystal can be from 100 kHz up to a few megahertz.
We found this circuit in a 1967 American documentation. The diodes are general-purpose and the...
This circuit digitally amplifies a signal providing an output formed by modulated pulses. It is a...
This circuit uses a common general-purpose diode as a sensor. Adjustment of the trigger point is...