This circuit was suggested by National Semiconductor and is present elsewhere on this site. The LM2575 is not very common today and should be mounted on a heatsink.
Found in Electronics Now from the 1980s, this amplifier can also be seen in commercial amplifiers...
This circuit generates a clock signal of a few megahertz to synchronize TTL circuits. The power is TTL...
This circuit separates the signals from a monophonic amplifier with the reproduction in two...