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 relaxation oscillator takes advantage of the negative resistance characteristics of a...
The purpose of this circuit is to increase the current of a MAX1735 regulator to obtain an output...
The basic idea of this circuit is to insert a mark on a signal that is being observed on an...