Patent ID: 7979783

Claim:
An error detection device for a command decoder reading out an associated sequence of control signal words from a command memory based on an input word, wherein the sequence of control signal words comprises at least one control signal word, comprising: control device configured to provide the input word at a first time and the input word at a second time for reading out the command memory, wherein the second time is delayed with respect to the first time, effecting a readout of the associated sequence of control signal words at a first time and a readout of the associated sequence of control signal words at a second time; and comparing device configured to receive and compare the sequences of control signal words read out at the first and second times, and to output a signal indicating an error if the sequence of control signal words read out at the first time and the sequence of control signal words read out at a second time are different, wherein the comparing device includes a first signal processing unit and a second signal processing unit, wherein the first signal processing unit receives the sequence of control signal words, which was read out by applying the input word at the first time, and provides a first signal processing result, wherein the second signal processing unit receives the sequence of control signal words, which was read out by applying the input word at the second time, and provides a second signal processing result, and wherein the comparing device compares the first signal processing result and the second signal processing result.