Patent ID: 8188775
Filing Date: 2012-05-29
Classification: H03K

Abstract:
1. A circuit arrangement for operating voltage detection, comprising: a first and a second supply voltage terminal; a detection block with a first transistor that is connected between the first supply voltage terminal and a first node and has a first control terminal, with a first resistor element that is connected between the first node and the second supply voltage terminal, with a second transistor that is connected between the first supply voltage terminal and a second node and has a second control terminal, with a second resistor element that is connected between the second node and the second supply voltage terminal, with a first switch that connects the first node to the second control terminal, and with a third resistor element that is connected between the second control terminal and the first supply voltage terminal; and a control block that is set up to derive a first switching signal as a function of a voltage at the second node, as well as a second switching signal by inverting the first switching signal, and to supply the first switching signal to the first switch and the second switching signal to the first control terminal.