This circuit was found in a 90s Electronic Engineering. The quadruple operational amplifier can be replaced by an equivalent. RL determines the tested resistance range.
The PA222 integrated circuit used in this project from an American 1967 documentation is not...
This digital CMOS circuit generates sinusoidal signals from a 10 kHz rectangular signal. The...
Found in American documentation from the 90s, this circuit makes use of common components. The load must...