Found in a 1969 EDN, this high current circuit, not indicated in the documentation, uses transistors from that time. The input voltage can be between 9 and 11 V.
Found in 80's Electronic Engineering, this circuit has a linear response, being indicated for...
This circuit was found in 1978 documentation, using the National Semiconductor's LM380. The...
Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent...