This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
Found in an 80's Electronic Design, this circuit is based on the ICL7107 which is not an easy...
This circuit is used as a magnetic field sensor and is based on a Texas Instruments HaII Effect...
This circuit was found in a Japanese documentation of the 70's. It uses transistors of the era and is...