This 100 kHz oscillator was found in a 1966 Motorola publication. The transistors are of types suitable for the generated frequency and L1 / C1 depend on that frequency.
As part of a larger project, we found this modulation meter in the August 1994 Electronics Now...
The circuit shown in the figure is the version activated at the low level, of the previous circuit...
This is a high side smart current monitor circuit. The circuit is from a 2005 Linear Technology...