| 摘要 |
A circuit configuration with an integrated amplifier is described. The amplifier has an output stage that is connected to a supply potential terminal and a reference potential terminal. A pair of complementary output transistors couples the amplifier with a tri-state output. Given an interruption of an operating-current supply that is connectible to the reference and supply potential terminals, the tri-state output is put into a high-impedance state by the circuit configuration. To this end, two blocking transistors are provided, which can be supplied by respective charge pump circuits. For instance, for sensor applications in which a high operational reliability is required, the present circuit configuration prevents the misinterpretation of measurement results given disturbances, for a small outlay.
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