This oscillator with emitter follower was found in an American documentation from the 80's. The circuit generates 100 MHz signals and the transistors admit modern equivalents.
We found this circuit at Modern Electronics in January 1991. The magazine no longer exists, but...
The integrated circuit used in this filter is not very common today, but the reader can use...
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...