This voltage-controlled oscillator was found in a 1965 Electronic Design. Transistors are from the time, and modern equivalents can be tested.
This sophisticated inverter circuit of excellent performance was found in a French publication in 1995. The...
The integrated circuit used in this application is the Texas Instruments LMV358A, a low voltage...
This circuit is from 80s documentation, using still common CMOS components. The display is 7...