This circuit is from 1985 documentation. The integrated circuit is not very common today, but modifications can be made leading to a project with current integrated circuits.
In the figure, from a documentation from the 70s, we have a few-watt amplifier for general use....
The simple mixer presented can be used to mix the signals from low intensity sources, applying them to...
Found in McGraw Hill documentation from the 1990s, this circuit supplies high voltage to the...