This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.
In the figure we have the circuit of an amplifier for alternating signals with 10 times gain,...
We found this circuit in a documentation on active filters from 1977. The gain of this circuit is...
Figure bellow shows a ring oscillator using five inverters of a 4049. [The circuit operates only...