Regulator circuit with Zener reference.

摘要

The voltage regulator circuit comprises an input (12a) receiving the voltage to be limited (VBS), this input being connected to earth by the bias of a limiting transistor (18). To control this transistor, a comparator (15) is used together with an asymmetric differential stage (19). The differential stage receives the voltage to be limited and a reference voltage (Vref) produced with the aid of a Zener diode (13). It provides to the comparator voltages (V0,V1) which are lower than it receives. The output of the comparator is applied to the control grid of the limiting transistor. <IMAGE>