This circuit was found in the April 1978 Radio Electronics magazine. The power supply must be symmetrical, and the maximum operating frequency is around 100MHz.
This 1000: 1 voltage-controlled filter circuit was found in an Electronics Today International in a 1980s...
In the figure we show how to supply a DC motor from 6 to 12 V with alternating current. The diodes...
Found in a Radio Electronics we have in the figure a circuit to disconnect an SCR with direct...