This circuit was found in an 80's Electronic Design. It amplifies TTL fast signals for a coaxial cable. TTL is from the S (Schottky) line and transistors are types of the time.
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...