Supply voltage monitoring and/or regulating circuit compares at least one of two supply voltages with permissible range for controlling electronic shunt circuit

摘要

The circuit provides monitoring and/or regulation of at least two different supply voltages (U12,U22) supplied to respective load circuits (V1,V2) via corresponding circuit outputs (12,22) and provided by different voltage sources (Q1,Q2). At least one voltage is compared with a tolerance range via an electronic voltage monitoring stage (1), for providing a control signal for an electronic shunt circuit (2) with a controlled semiconductor (21), supplied with a shunt current (IS) obtained from both voltage sources when the control signal indicates that one of the voltages is outside the required range.