The circuit is from 1994 National Semiconductor documentation. The component is not easy to obtain, but there are equivalents that can be searched.
In this simulation we show how to implement a test circuit for BJT transistores. In the simulation we show a...
I found this circuit in an article in a 2003 publication. The circuit is an example of how to...
This oscillator is enabled when a high level is applied to the control input. The operating...