Abstract: There is provided an apparatus for processing timestamps generated by two or more time-to-digital converters (TDCs) that comprises: at least two TDCs, a reference clock, a counter and a stream generator that output a timestamp data stream (TD #1), a first input signal that is periodic or quasi periodic, a second input signal, an electronic circuit or computer program that takes said timestamp data stream as an input and generates a new timestamp data stream (TD #2). Said electronic circuit or computer program performs refining and rescaling calculations thereby providing means to enhance the accuracy of a plurality of timestamps and to express a plurality of timestamps in a different time reference frame.

Abstract: There is provided an apparatus for processing timestamps generated by two or more time-to-digital converters (TDCs) that comprises: at least two TDCs, a reference clock, a counter and a stream generator that output a timestamp data stream (TD #1), a first input signal that is periodic or quasi periodic, a second input signal, an electronic circuit or computer program that takes said timestamp data stream as an input and generates a new timestamp data stream (TD #2). Said electronic circuit or computer program performs refining and rescaling calculations thereby providing means to enhance the accuracy of a plurality of timestamps and to express a plurality of timestamps in a different time reference frame.

Abstract: The invention relates to a control device for the removal of a partial stack from a stack of paper sheets comprising a camera (30) for generating of a camera image, means (41) for generating of at least two substantially parallel light beams whose reflections (52, 53) on the stack of paper sheets are reproduced in the camera image (50), and means providing a control signal for the removal of a partial stack (12) using the distance (54) of the reflections (52, 53) in the camera image (50). Furthermore, the invention relates to un unstacking device for the removal of a partial stack from a stack of paper sheets, comprising a parting mechanism (20) with a parting knife (21), wherein the parting knife (21) can be swivelled upwards and/or downwards in order to be able to follow the paper progress upwards and/or downwards during unstacking.