Found in 1969 RCA documentation, this circuit maintains constant current in the filament of a lamp or in a heating element. The circuit makes use of period components.
Used with telephones at the time, this circuit was found in Popular Electronics from the 90s. The...
Unlike the CIR4620 circuit, the circuit shown in the figure operates by capacitance. This means...
This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time,...