| 摘要 |
A circuit arrangement for operating voltage detection has a detection block (1) and a control block (2). Detection block (1) has a first transistor (P1) that is connected between a first supply voltage terminal (VDD) and a first node (K1) and has a first control terminal (S1), a first resistor element (R1) that is connected between first node (K1) and second supply voltage terminal (VSS), a second transistor (P2) that is connected between first supply voltage terminal (VDD) and a second node (K2) and has a second control terminal (S2), a second resistor element (R2) that is connected between second node (K2) and second supply voltage terminal (VSS), a first switch (N1) that connects first node (K1) to second control terminal (S2), and a third resistor element (R3) that is connected between second control terminal (S2) and first supply voltage terminal (VDD). Control block (K2) is set up to derive a first switching signal as a function of a voltage at second node (K2), as well as a second switching signal by inverting the first switching signal. The first switching signal is supplied to first switch (N1), and the second switching signal to first control terminal (S1).
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