51.
    发明专利
    未知

    公开(公告)号:DE60203039T2

    公开(公告)日:2006-01-12

    申请号:DE60203039

    申请日:2002-07-19

    Abstract: Switched level-shift circuit for a signal-switch (1) which is provided for switching an applied analog input signal (VAIN), wherein the switched level-shift circuit (5) comprises an input terminal (13) for the analog input signal applied to the signal-switch (1), a control input terminal (18) for a control signal (SW), an analog level-shift circuit (15) which adds a constant voltage to the analog input signal (VAIN) to generate a level-shifted analog output signal when the control signal (SW) is in a first logical state (high); and an output terminal (4) for the generated level-shifted analog output signal which is connected to a gate terminal (2) of said signal-switch (1).

    58.
    发明专利
    未知

    公开(公告)号:DE10121715A1

    公开(公告)日:2002-11-14

    申请号:DE10121715

    申请日:2001-05-04

    Abstract: Interfering offset voltages can occur, particularly in optical data transmission networks, in the case of direct voltage-coupled receive circuits and can stem from a level of background noise of the transmitters of the light signals. Additionally, due to different transmission paths, the amplitudes of the information signals can vary greatly so that, according to amplitude, a different threshold value for a comparator circuit (8) is required for recovering the bit sequence. In order to rectify this drawback, a first step is used during which the direct component is measured at the input or output of an amplifying circuit (3) and, according to this measurement, a correction value is formed for offset compensation. In a second step and in the case of a correction value applied to the output of the amplifying circuit (3), another measurement of the information signal is carried out in order to determine an appropriate threshold value for the comparator circuit (8). The correction value or the threshold value is established at each transmitter and is stored in a storage arrangement (18, 19). In order to evaluate the information signal of a specific transmitter, the correction value or threshold value stored for this transmitter is applied to the amplifying circuit (3) or to the comparator circuit (8) by means of two digital-analog converters (14, 16).

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