This 100 MHz bridge circuit was found in an American 1970s documentation. The supply voltages are not indicated, nor are the tubes.
We found this circuit in English documentation from 1996 for PCs. The circuit is for common...
This circuit uses an operational amplifier to simulate an inductor. The circuit is from old...
Using this circuit the lamps glow in sequence in a speed given by the capacitors. The SCRs present a...