CURRENT REGULATOR APPARATUS WITH BALLAST TRANSISTOR PROVIDED WITH A SUPPLEMENTAL TRANSISTOR TO LIMIT THE AVERAGE POWER DISSIPATION OF THE BALLAST TRANSISTOR

摘要

1. Device for generating a regulated current, comprising a semi-conductor member (T1 ) playing the role of ballast resistance, fed by a rectified a-c source (V) and biased by a reference voltage (Zener diode Z), characterized by an auxiliary semi-conductor member (T2 ) connected in series with the semi-conductor ballast member (T1 ) and biased by a voltage divider (R3 -R4 ) connected to the terminals of said source.