Siemens Aktiengesellschaft

Joachim Krause

Xaver Guggenmos

Christian Stein

Guenther Eberhard

A circuit configuration protects the terminals of integrated circuits, in particular CMOS circuits. The circuit configuration includes bypass transistors connected between the terminals of the integrated circuit and respective supply potential terminals. The bypass transistors are thin-oxide transistors of the n-channel type and are connected such that their gate-to-source voltage is zero.

Circuit configuration for protecting terminals of integrated circuits

A dynamic MOS-circuit comprising a bootstrap capacitor decoupled by an output transistor and wherein the bootstrap capacitor is discharged via a MOS-FET. The MOS-FET is connected as a constant current source. With the invention, a control voltage at an output MOS-FET is nearly double an operating voltage of the circuit.

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Landshut, Germany

Joachim Krause