This circuit was found in a 1980s documentation, using a comparator from the time. The configuration can also be implemented with comparators or modern operational.
This oscillator with emitter follower was found in an American documentation from the 80's. The...
We found this circuit in 2005 Linear Technology documentation. The integrated circuit is LT1787...
The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook. The...