SPANNUNGSVERSORGUNGSSCHALTUNG EINER STROMVERSORGUNGSEINHEIT

摘要

The positive potential side output of a voltage source (1) is connected to the positive potential side of a first circuit (10) through a terminal (6), and the ground (negative potential) side output of the source (1) is connected to the ground (negative potential) side of the circuit (10) through a terminal (8). In addition, the positive potential side output of the source (1) is connected to the positive potential side of a second circuit (11) through a terminal (7) after the output is lowered by a prescribed voltage V by means of a Schottky barrier diode (2) and the ground (negative potential) side output of the source (1) is connected to the ground (negative potential) side of the circuit (11) through a terminal (9) after the output is raised by the prescribed voltage V by means of a Schottky barrier diode (4). Thus, a power supply voltage supplying circuit which prevents the occurrence of latch-up while the current consumption and the occurrence of electromagnetic interference (EMI) are suppressed to low levels is provided.