Patent ID: 7321239
Filing Date: 2008-01-22
Classification: H03K,H04L

Abstract:
1. A differential line receiver circuit for receiving differential digital signals from a transmission line, comprising a differential input stage having a differential input for coupling with said transmission line; an output stage having a differential signal current interface with said input stage for receiving differential driving currents from said input stage, and a circuit for translating said driving currents into complementary binary output signals, the rise time and fall time of the edges of said binary output signals depending on the levels of said driving currents; and a timing deviation detector circuit coupled to the outputs of said output stage, for detecting at least one of deviations between the rise time and the fall time of said complementary binary output signals and deviations of the timing of the rising and the falling edges, and generating a detector signal in accordance with the detected deviation; wherein said input stage comprises a first current source for generating a source current and a second current source for generating a sink current; and a switching stage for switching in accordance with said signals received from said transmission line said currents generated by said first and said second current sources into said interface of said output stage for translation by said output stage into said complementary binary output signals; and a current source control circuit for controlling the respective amount of current generated by at least one of said first and said second current sources by generating respective current control signals based on said detector signal.