Found in American documentation from 1968, this circuit has an acute cut-off of the frequency to which it is tuned and which depends on RC. Transistors may be modern equivalents of general use.
Found in old American documentation, this circuit can be implemented with modern operational...
We found this CMOS circuit in a 1978 publication. It allows you to use a standard calculator...
This configuration is used to display the characteristic curve of a diode in the virtual...