Circuit for limiting the input voltage on a pin of an integrated circuit

Abstract

The arrangement (5) is designed as a gradual limiter and filter circuit to limit that input voltage at a connection pin (16) of an IC (1). The arrangment is electrically connected to the connection pin(16).

Description

technical field [0001] The invention relates to a circuit arrangement for limiting an input voltage at a pin of an integrated circuit to which the circuit arrangement is electrically connected. Background technique [0002] A voltage within a certain range of values ​​should normally be applied to the pins of an integrated circuit. However, such an operating state in which a voltage value outside the predetermined value range occurs at the pin of the integrated circuit occurs repeatedly. Those operating states in which these voltage windows are exceeded often lead to erroneous responses or malfunctions in the integrated circuit. In a conventional integrated circuit, the peak value of the applied voltage should be no more than 0.3V above the positive supply voltage and no less than -0.3V below the negative supply voltage. Furthermore, the minimum or maximum voltage value is often defined by the potential around the supply voltage. Depending on the application of the integr...

AI Technical Summary

Problems solved by technology

A significant disadvantage of this arrangement can be seen in the fact that the high leakage current of the Schottky diode 3 impairs the functioning of the integrated circuit 1 in the case of very sensitive conditions of the integrated circuit 1, especially at elevated temperatures

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