This high-speed circuit was found in 1980s Linear Technology documentation. The circuit makes use of components of the time with TTL output and TTL input that enable their use as a shield.
This setting appears multiple times on the site from different sources. This is from a 2000 manual...
This old fashioned amplifier can source some watts to a low impedance loudspeaker. The circuit...
Oscillators up to some megaherts can be made with comparators like the LM139, 239 or 339. Theses...