This circuit was found in a Electronics World of 1968. The integrated circuit is the MC1320P from Motorola, uncommon today.
In this interesting circuit from Popular Electronics, the output voltage is the square root of the...
This circuit uses a power component that is not common today, being recommended by Motorola in the...
This circuit is based on an LM123 and can supply output currents up to 3A. IB is typically 3.5A...