This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has digital-gain control and must be powered by a symmetrical 15 V source.
This was the original title given by the publication of the 80s in which we found it. Similar...
With this passive circuit it is possible to modulated in amplitude a low intensity RF signal. The...
This watch was found in 2001 documentation. The watch is powered by 4 batteries. To save energy, the...