Siemens Aktiengesellschaft

Rudiger Brede

Dominique Savignac

Helmut Schneider

Gunnar H Krause

Thilo Schaffroth

Norbert Wirth

An adjustable delay circuit for digital signals includes a series circuit which is disposed between two supply potentials and has at least a first transistor of a first conduction type and second and third transistors of a second conduction type. Control connections of the first and second transistors are connected to a signal input of the delay circuit. One connection of the first transistor, which is remote from the first supply potential, is connected to a signal output. A fourth transistor of the second conduction type is connected in parallel with the third transistor. A first control input is connected to a control connection of the third transistor and a second control input is connected to a control connection of the fourth transistor. The control inputs are used to adjust the delay time of the delay circuit.

Adjustable delay circuit

A circuit apparatus for evaluating a data content of memory cells of an integrated semiconductor memory, which memory cells are disposed along bit lines and word lines. The circuit apparatus has a voltage compensation device with voltage compensation elements which are connected for the purpose of voltage coupling of in each case two neighboring bit lines and which enable compensation for a capacitive coupling between the bit lines.

Circuit apparatus for evaluating the data content of memory cells

The fuse refresh circuit for semiconductor memories has a set circuit for setting a fuse latch circuit. The fuse latch circuit is set by the set circuit in at least one refresh cycle after a voltage supply has been switched on. During the refresh cycle of the fuse latch circuit, the latter is driven with pulses in such a way that the state of the fuse latch circuit is evaluated and only an incorrectly set fuse latch circuit is set to be correct.

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Hohenkirchen, Germany

Rudiger Brede