In this 1990s circuit, found in a National Semiconductor manual, the output voltage is the square of the input voltage. The components are from the period.
The FET admits equivalents like the BF245 in this circuit that we find in a documentation from the...
This capacimeter was obtained in European documentation from the 1980s. The indicator instrument, a...
This circuit consists of an amplifying probe for oscilloscopes and other instruments that can...