This sample and hold circuit is from a 1969’s documentation. However, it can be built with modern equivalent components, including the matched pair of transistors.
This fiber optic receiver was obtained from a 1978 documentation. We can use any modern...
This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch...
This circuit was found in an old Motorola documentation from the 70s, as it uses one of its...