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Method and device for diving an integrated power output stage

  • US 6,194,951 B1
  • Filed: 03/16/2000
  • Issued: 02/27/2001
  • Est. Priority Date: 09/15/1998
  • Status: Expired due to Fees
First Claim
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1. A method for driving an integrated power output stage having a limit switch for switching a load connected to terminals of a voltage source in series with the limit switch, a control unit generates control signals for driving the integrated power output stage, the method which comprises:

  • measuring a voltage at a junction point between the load and the limit switch if the load is disconnected resulting in a measured voltage;

    comparing the measured voltage with a predetermined threshold value resulting in a comparison result;

    storing a value associated with the comparison result over a course of operation;

    turning on and off the limit switch to have shallow turn-on and turn-off edges with a first predetermined current when the value has a first, low signal level; and

    turning on and off the limit switch to have steep turn-on and turn-off edges with a second current if the value has a second, high signal level, the second current being a higher current than the first predetermined current.

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