Patent ID: 7536114
Filing Date: 2009-05-19
Classification: H03F,H03G,H03K,H04B

Abstract:
1. A method for converting a received optical pulse train received using an IrDA receiver into an electric output pulse train, wherein the received optical pulse train has pulse packets and packet pauses and wherein the received optical pulse train is converted into a light-dependent current pulse train that is transformed into a voltage pulse train whose amplitude is regulated and whose pulses are transformed into digital output pulses of the output pulse train, the method comprising; transforming the current pulse train into a first voltage pulse train in a controlled manner; transforming the first voltage pulse train into a second voltage pulse train by controllably limiting an amplitude of the first voltage pulse train to result in the second voltage pulse train; generating a third voltage pulse train as a function of the amplitude of said second voltage pulse train such that said third voltage train is free of a static offset of said second voltage pulse train if the second voltage pulse train is below a first amplitude threshold, said third voltage pulse train is free of said static offset to a reduced degree if the second voltage pulse train is above the first amplitude threshold, the reduced degree being reduced relative to an amount of static offset if the second voltage pulse train is below the first amplitude threshold; generating said third voltage pulse train free of a dynamic offset, if the third pulse train is above a second amplitude threshold that is above said first amplitude threshold, and generating said third voltage pulse train with only a reduced degree of said dynamic offset of said second voltage pulse train, if the third pulse train is below said second amplitude threshold wherein at the occurrence of a packet pause the amplitude of said third voltage pulse train is set to zero; and the output pulse train is generated from the third voltage pulse train.