This high input impedance circuit was found in American documentation from the 1980s. The power supply must be symmetrical. The circuit applies to modern operational.
Using three gates of t4011 this oscillator produces a rectangular signal with frequency given by...
Found in a 90s Popular Electronics, it serves both TTL and CMOS logic. The injector can provide 10...
This circuit, with the TBA810 circuit, which is no longer common today, was found in a 1985...