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Abstract

The delay unit has first delay elements each having a first delay time and second delay elements each having a second delay time. The second delay time is greater than the first delay time. A control unit controls the delay time of the delay unit by, first, incrementally increasing or by incrementally reducing the number of second delay elements in the signal path and thereby altering the actual value of the delay in the direction towards a desired (setpoint) value until the desired value is exceeded. The control unit then, by incrementally reducing or increasing, respectively, the number of first delay elements in the signal path, alters the actual value of the delay in the direction towards the desired value until the desired value is exceeded once more. In the event of subsequent changes in the desired value or in the actual value, the number of first delay elements is incrementally altered, while the number of second delay elements in the signal path is kept constant.

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