We found these circuits in a Popular Electronics from the 90s. The circuit has a simple low power version and a higher power version with MOSFET (VMOS) of the time.
Obtaining a voltage that is proportional to a current drained by a load can be important in...
The filter shown in the figure, suggested by National Semiconductor, only allows frequencies above...
This circuit allows you to find two diodes with equal characteristics. The circuit was found in a...