This circuit is from a 1968 documentation using one of the first integrated circuits available at the time, the TAA370. The circuit is powered by 1.3 V using a 200 ohm handset.
July 1017 - Maxim MAX17290 and MAX17292 PWM boost controllers can now be purchased from Mouser...
a We find this circuit which has a traditional configuration in a 1988 publication. The circuit is...
This circuit is used as a magnetic field sensor and is based on a Texas Instruments HaII Effect...