This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no constructive data for the transformer used in the output.
This circuit is characterized by its low input impedance and voltage gain below the unit. The...
The circuit shown in the figure makes use of an LM3909, a low consumption and low voltage IC. The...
This receiver was obtained in a documentation from the 90's and is of the super-regenerative type....