This circuit is from an American 1967 documentation and can be implemented with modern equivalent transistors. The circuit serves as a Q multiplier.
Suggested by American documentation from the 90s, this circuit has separate controls for the...
We found this circuit in a 1977 CMOS oscillators documentation. The power can be sourced with...
This filter, which rejects frequencies around 1 kHz, was found in the August 1993 Electronics Now...